Recognised as Number
761
- Positive
- Odd
- Prime
- 3 digits
761 is an odd 3-digit integer and a prime number. It has 2 divisors and a digital root of 5.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value761
Digit count3
Digit sum14
Digit product42
Multiplicative persistence2times the digit product can be taken before one digit is left
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation761
Distinct prime factors1761
Number of divisors2
Sum of divisors σ(n)762
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)760integers below n that share no factor with it
Carmichael function λ(n)760the smallest exponent with aˣ ≡ 1 for every unit coprime to n
Möbius function μ(n)−11 distinct prime factor, an odd number of them
SquarefreeYesno repeated prime factor
All divisors1, 7612 in total
Arithmetic
Representations
Decimal761
Binary101111100110 bits
Octal1371
Hexadecimal2F9
Base 36L5
Roman numeralDCCLXI
In wordsseven hundred and sixty-one
Ordinalseven hundred and sixty-first
Scientific notation7.61 × 10^2
Engineering notation761
In other bases
Ternary1001012base 3; the most digit-efficient integer base after e: 7 digits
Quinary11021base 5; one hand: 5 digits
Septenary2135base 7: 4 digits
Nonary1035base 9; each digit is two ternary digits: 4 digits
Duodecimal535base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimal1i1base 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal12:41base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary10011TTdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary11100001001base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000001011111001
Bit length10 bitsto write the magnitude
Set bits7the population count, or Hamming weight
Zero bits3within that length
Bit parityodd7 set bits, so odd; not the same as the number itself being odd
Highest set bitbit 9worth 512
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes202 f9
Gray code1110000101n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000001011111001
32-bit00000000000000000000001011111001
64-bit0000000000000000000000000000000000000000000000000000001011111001
One's complement1111110100000110at 16 bits, every bit flipped
Bits reversed1001111101000000at 16 bits
Rotated left by 10000010111110010at 16 bits, wrapping
Shifted left by 110111110010= 1,522, no wrap
Shifted right by 1101111100= 380, discarding the low bit
These bits as a double3.75983956 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
761 to the power 2579,121
761 to the power 3440,711,081
761 to the power 4335,381,132,641
761 to the power 5255,225,041,939,801
First ten multiples761, 1,522, 2,283, 3,044, 3,805, 4,566, 5,327, 6,088, 6,849, 7,610
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 1
Divisible by 5No, remainder 1
Divisible by 6No, remainder 5
Divisible by 7No, remainder 5
Divisible by 8No, remainder 1
Divisible by 9No, remainder 5
Divisible by 10No, remainder 1
Divisible by 11No, remainder 2
Divisible by 12No, remainder 5
Divisible by 100No, remainder 61
Collatz (3n + 1) trajectory
Steps to reach 133the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps761 → 2,284 → 1,142 → 571 → 1,714 → 857 → 2,572 → 1,286 → 643 → 1,930 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage76,100%
761% as a decimal7.61
761% of 100761
761% of 1,0007,610
As a fraction of 100761/100
Read another way
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Derived from 761
Other readings
Also reads as
#776611 (colour)
- #776611
- Yellow
- Dark
- Nearest: Olive
#776611 is a yellow with RGB values 119, 102, 17 and HSL 50°, 75%, 27%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Olive.
Colour values
#776611#776611
HEX#776611
HEX (short)#761
RGBrgb(119, 102, 17)
RGB (0–1)0.4667, 0.4, 0.0667
RGB percentages46.7%, 40%, 6.7%
HSLhsl(50, 75%, 26.7%)
HSV / HSBhsv(50, 85.7%, 46.7%)
CMYK0%, 14.3%, 85.7%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer7,824,913
CSS custom property--colour: #776611;
Brightness & contrast
Relative luminance0.13465WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.69:1
Contrast with white5.69:1WCAG normal text: AA
Contrast with black3.69:1WCAG normal text: Fail
Greyscale equivalent#636363
Inverted#8899EE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.69:1WCAG large text: AAA
Contrast with black, large text3.69:1WCAG large text: AA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#112277
Analogous#773311, #557711
Triadic#117766, #661177
Split complementary#115577, #331177
Tetradic#117733, #112277, #771155
Tints, shades & saturation
Channel breakdown
R119
G102
B17
Red119 (46.7%)
Green102 (40%)
Blue17 (6.7%)
Hue50°
Saturation (HSL)75%
Lightness26.67%
Dominant channelRed
Hex per channelR 77 · G 66 · B 11
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Harmonies
Similar named colours
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