1668

1,668 is an even composite number composed of three prime numbers multiplied together.

What does the number 1668 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

1668 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 1668:

22 × 3 × 139

(2 × 2 × 3 × 139)

See below for interesting mathematical facts about the number 1668 from the Numbermatics database.


Names of 1668

  • Cardinal: 1668 can be written as One thousand, six hundred sixty-eight.

Scientific notation

  • Scientific notation: 1.668 × 103

Factors of 1668

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 144

Divisors of 1668

  • Number of divisors d(n): 12
  • Complete list of divisors:
  • Sum of all divisors σ(n): 3920
  • Sum of proper divisors (its aliquot sum) s(n): 2252
  • 1668 is an abundant number, because the sum of its proper divisors (2252) is greater than itself. Its abundance is 584

Bases of 1668

  • Binary: 110100001002
  • Hexadecimal: 0x684
  • Base-36: 1AC

Squares and roots of 1668

  • 1668 squared (16682) is 2782224
  • 1668 cubed (16683) is 4640749632
  • The square root of 1668 is 40.8411557133
  • The cube root of 1668 is 11.8594718551

Scales and comparisons

How big is 1668?
  • 1,668 seconds is equal to 27 minutes, 48 seconds.
  • To count from 1 to 1,668 would take you about twenty-seven 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 1668 cubic inches would be around 1 feet tall.

Recreational maths with 1668

  • 1668 backwards is 8661
  • The number of decimal digits it has is: 4
  • The sum of 1668's digits is 21
  • More coming soon!

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The information we have on file for 1668 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!

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