Recognised as Number
6,722
- Positive
- Even
- Composite
- 4 digits
6,722 is an even 4-digit integer and a composite number. It has 4 divisors and a digital root of 8.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value6,722
Digit count4
Digit sum17
Digit product168
Multiplicative persistence4times the digit product can be taken before one digit is left
Digital root8repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 3,361
Distinct prime factors22, 3,361
Number of divisors4
Sum of divisors σ(n)10,086
Aliquot sum3,364sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)3,360integers below n that share no factor with it
Carmichael function λ(n)3,360the smallest exponent with aˣ ≡ 1 for every unit coprime to n
Möbius function μ(n)+12 distinct prime factors, an even number of them
SquarefreeYesno repeated prime factor
All divisors1, 2, 3,361, 6,7224 in total
Arithmetic
Previous number6,721
Next number6,723
Double13,444
Half3,361
Square45,185,284
Cube303,735,479,048
Square root81.987803971≈irrational, shown to 9 decimal places
Cube root18.872647836≈
Negation-6,722
Reciprocal0.0001487652≈
Representations
Decimal6,722
Binary110100100001013 bits
Octal15102
Hexadecimal1A42
Base 3656Q
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordssix thousand, seven hundred and twenty-two
Ordinalsix thousand, seven hundred and twenty-second
Scientific notation6.722 × 10^3
Engineering notation6.722 × 10^3
In other bases
Ternary100012222base 3; the most digit-efficient integer base after e: 9 digits
Quinary203342base 5; one hand: 6 digits
Septenary25412base 7: 5 digits
Nonary10188base 9; each digit is two ternary digits: 5 digits
Duodecimal3a82base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 4 digits
Vigesimalgg2base 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal1:52:2base 60; Babylonian, and still how an hour and a circle are divided: 3 digits
Balanced ternary1001T000Tdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary110111001000110base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0001101001000010
Bit length13 bitsto write the magnitude
Set bits5the population count, or Hamming weight
Zero bits8within that length
Bit parityodd5 set bits, so odd; not the same as the number itself being even
Highest set bitbit 12worth 4,096
Lowest set bitbit 11 trailing zero
Power of twoNo
Bytes21a 42
Gray code1011101100011n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0001101001000010
32-bit00000000000000000001101001000010
64-bit0000000000000000000000000000000000000000000000000001101001000010
One's complement1110010110111101at 16 bits, every bit flipped
Bits reversed0100001001011000at 16 bits
Rotated left by 10011010010000100at 16 bits, wrapping
Shifted left by 111010010000100= 13,444, no wrap
Shifted right by 1110100100001= 3,361, discarding the low bit
These bits as a double3.32110927 × 10^-320≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
6,722 to the power 245,185,284
6,722 to the power 3303,735,479,048
6,722 to the power 42,041,709,890,160,656
6,722 to the power 513,724,373,881,659,929,632
First ten multiples6,722, 13,444, 20,166, 26,888, 33,610, 40,332, 47,054, 53,776, 60,498, 67,220
Powers of twoBetween 2^12 (4,096) and 2^13 (8,192)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4No, remainder 2
Divisible by 5No, remainder 2
Divisible by 6No, remainder 2
Divisible by 7No, remainder 2
Divisible by 8No, remainder 2
Divisible by 9No, remainder 8
Divisible by 10No, remainder 2
Divisible by 11No, remainder 1
Divisible by 12No, remainder 2
Divisible by 100No, remainder 22
Collatz (3n + 1) trajectory
Steps to reach 144the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps6,722 → 3,361 → 10,084 → 5,042 → 2,521 → 7,564 → 3,782 → 1,891 → 5,674 → 2,837 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage672,200%
6,722% as a decimal67.22
6,722% of 1006,722
6,722% of 1,00067,220
As a fraction of 1006,722/100
Read another way
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Derived from 6,722
Also reads as
6722 (year)
- Common year
- 365 days
- 68th century
- Dog
6722 will be a common year of 365 days. It begins on a Sunday and ends on a Sunday. Easter Sunday falls on 26 March.
Structure of the year
Patterns forced by the calendar
Weekday counts52 of each, plus an extra Sunday365 days is 52 weeks and 1 day, and the remainder starts on the weekday 1 January falls on
Sundays53one of the extras
Mondays52
Tuesdays52
Wednesdays52
Thursdays52
Fridays52
Saturdays52
Friday the 13th2 of them13 January, 13 October
ISO weeks52an ordinary 52-week year
Same calendar as6711the most recent year whose calendar is identical, so a printed one could be reused
Calendar repeats in6733, 6739, 675011 years later, then again after that; the gap is 6, 11 or 28 years, broken by centuries that skip a leap year
Months of 6722
January31 days, starts Sunday
February28 days, starts Wednesday
August31 days, starts Tuesday
September30 days, starts Friday
October31 days, starts Sunday
November30 days, starts Wednesday
December31 days, starts Friday
Time references
These values depend on today’s date and change daily.
Unix timestamp at the start149,958,604,800
Unix timestamp at the end149,990,140,799
Years from now4,696 years from now
Days from today1,714,923 days to 1 January
The number 6722
As a number6,722
In wordssix thousand, seven hundred and twenty-two
Roman numeralsNot defined above 3,999
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Also reads as
#667722 (colour)
- #667722
- Green
- Dark
- Nearest: Dark olivegreen
#667722 is a green with RGB values 102, 119, 34 and HSL 72°, 56%, 30%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Dark olivegreen.
Colour values
#667722#667722
HEX#667722
HEX (short)#672
RGBrgb(102, 119, 34)
RGB (0–1)0.4, 0.4667, 0.1333
RGB percentages40%, 46.7%, 13.3%
HSLhsl(72, 55.6%, 30%)
HSV / HSBhsv(72, 71.4%, 46.7%)
CMYK14.3%, 0%, 71.4%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,715,170
CSS custom property--colour: #667722;
Brightness & contrast
Relative luminance0.16134WCAG 2.x, 0 is black and 1 is white
Perceived brightness107.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.97:1
Contrast with white4.97:1WCAG normal text: AA
Contrast with black4.23:1WCAG normal text: Fail
Greyscale equivalent#6D6D6D
Inverted#9988DD
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.97:1WCAG large text: AAA
Contrast with black, large text4.23:1WCAG large text: AA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#332277
Analogous#775E22, #3C7722
Triadic#226677, #772266
Split complementary#223B77, #5E2277
Tetradic#22775E, #332277, #77223B
Tints, shades & saturation
Channel breakdown
R102
G119
B34
Red102 (40%)
Green119 (46.7%)
Blue34 (13.3%)
Hue72°
Saturation (HSL)55.56%
Lightness30%
Dominant channelGreen
Hex per channelR 66 · G 77 · B 22
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Harmonies
Similar named colours
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