669

669 is an odd composite number composed of two prime numbers multiplied together.

What does the number 669 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

669 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 669:

3 × 223

See below for interesting mathematical facts about the number 669 from the Numbermatics database.


Names of 669

  • Cardinal: 669 can be written as Six hundred sixty-nine.

Scientific notation

  • Scientific notation: 6.69 × 102

Factors of 669

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 226

Divisors of 669

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 896
  • Sum of proper divisors (its aliquot sum) s(n): 227
  • 669 is a deficient number, because the sum of its proper divisors (227) is less than itself. Its deficiency is 442

Bases of 669

  • Binary: 10100111012
  • Hexadecimal: 0x29D
  • Base-36: IL

Squares and roots of 669

  • 669 squared (6692) is 447561
  • 669 cubed (6693) is 299418309
  • The square root of 669 is 25.8650343127
  • The cube root of 669 is 8.7459845521

Scales and comparisons

How big is 669?
  • 669 seconds is equal to 11 minutes, 9 seconds.
  • To count from 1 to 669 would take you about five minutes.

    This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

  • A cube with a volume of 669 cubic inches would be around 0.7 feet tall.

Recreational maths with 669

  • 669 backwards is 966
  • The number of decimal digits it has is: 3
  • The sum of 669's digits is 21
  • More coming soon!

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"Number 669 - Facts about the integer". Numbermatics.com. 2021. Web. 9 December 2021.

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Numbermatics. (2021). Number 669 - Facts about the integer. Retrieved 9 December 2021, from https://numbermatics.com/n/669/

Chicago style:
Numbermatics. 2021. "Number 669 - Facts about the integer". https://numbermatics.com/n/669/

The information we have on file for 669 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

Keywords: Divisors of 669, math, Factors of 669, curriculum, school, college, exams, university, Prime factorization of 669, STEM, science, technology, engineering, physics, economics, calculator, six hundred sixty-nine.

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