Number
670
- Positive
- Even
- Composite
- 3 digits
670 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 4.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value670
Digit count3
Digit sum13
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5 × 67
Distinct prime factors32, 5, 67
Number of divisors8
Sum of divisors σ(n)1,224
Aliquot sum554sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)264integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 5, 10, 67, 134, 335, 6708 in total
Arithmetic
Representations
Decimal670
Binary101001111010 bits
Octal1236
Hexadecimal29E
Base 36IM
Roman numeralDCLXX
In wordssix hundred and seventy
Ordinalsix hundred and seventieth
Scientific notation6.7 × 10^2
Engineering notation670
Nearest landmarks
Powers & multiples
670 to the power 2448,900
670 to the power 3300,763,000
670 to the power 4201,511,210,000
670 to the power 5135,012,510,700,000
First ten multiples670, 1,340, 2,010, 2,680, 3,350, 4,020, 4,690, 5,360, 6,030, 6,700
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 4
Divisible by 7No, remainder 5
Divisible by 8No, remainder 6
Divisible by 9No, remainder 4
Divisible by 10Yes
Divisible by 11No, remainder 10
Divisible by 12No, remainder 10
Divisible by 100No, remainder 70
Collatz (3n + 1) trajectory
Steps to reach 169the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps670 → 335 → 1,006 → 503 → 1,510 → 755 → 2,266 → 1,133 → 3,400 → 1,700 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage67,000%
670% as a decimal6.7
670% of 100670
670% of 1,0006,700
As a fraction of 100670/100
Read another way
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Derived from 670
Other readings
Also reads as
#667700 (colour)
- #667700
- Yellow
- Dark
- Nearest: Olive
#667700 is a yellow with RGB values 102, 119, 0 and HSL 69°, 100%, 23%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Olive.
Colour values
#667700#667700
HEX#667700
HEX (short)#670
RGBrgb(102, 119, 0)
RGB (0–1)0.4, 0.4667, 0
RGB percentages40%, 46.7%, 0%
HSLhsl(68.6, 100%, 23.3%)
HSV / HSBhsv(68.6, 100%, 46.7%)
CMYK14.3%, 0%, 100%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,715,136
CSS custom property--colour: #667700;
Brightness & contrast
Relative luminance0.16018WCAG 2.x, 0 is black and 1 is white
Perceived brightness106.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5:1
Contrast with white5:1WCAG normal text: AA
Contrast with black4.2:1WCAG normal text: Fail
Greyscale equivalent#6B6B6B
Inverted#9988FF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5:1WCAG large text: AAA
Contrast with black, large text4.2:1WCAG large text: AA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#110077
Analogous#774C00, #2B7700
Triadic#006677, #770066
Split complementary#002B77, #4C0077
Tetradic#00774C, #110077, #77002B
Tints, shades & saturation
Channel breakdown
R102
G119
B0
Red102 (40%)
Green119 (46.7%)
Blue0 (0%)
Hue68.57°
Saturation (HSL)100%
Lightness23.33%
Dominant channelGreen
Hex per channelR 66 · G 77 · B 00
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Harmonies
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