668311162728

Names of 668311162728

• Cardinal: 668311162728 can be written as Six hundred sixty-eight billion, three hundred eleven million, one hundred sixty-two thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 6.68311162728 × 10¹¹

Factors of 668311162728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 121378

Divisors of 668311162728

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 4 6 8 11 12 22 24 33 44 66 88 132 264 26759 53518 80277 94603 107036 160554 189206 214072 283809 294349 321108 378412 567618 588698 642216 756824 883047 1040633 1135236 1177396 1766094 2081266 2270472 2354792 3121899 3532188 4162532 6243798 7064376 8325064 12487596 24975192 2531481677 5062963354 7594445031 10125926708 15188890062 20251853416 27846298447 30377780124 55692596894 60755560248 83538895341 111385193788 167077790682 222770387576 334155581364 668311162728
• Sum of all divisors σ(n): 1822754188800
• Sum of proper divisors (its aliquot sum) s(n): 1154443026072
• 668311162728 is an abundant number, because the sum of its proper divisors (1154443026072) is greater than itself. Its abundance is 486131863344

Bases of 668311162728

• Binary: 1001101110011010011100110000111101101000₂
• Hexadecimal: 0x9B9A730F68
• Base-36: 8J0N7LGO

Squares and roots of 668311162728

• 668311162728 squared (668311162728²) is 446639810226851296401984
• 668311162728 cubed (668311162728³) is 298494370893320255344764089926052352
• The square root of 668311162728 is 817503.0047210835
• The cube root of 668311162728 is 8742.9817474051

Scales and comparisons

• 668,311,162,728 seconds is equal to 21,250 years, 11 weeks, 5 days, 21 hours, 38 minutes, 48 seconds.
• To count from 1 to 668,311,162,728 would take you about forty-two thousand, five hundred years!

  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 668311162728 cubic inches would be around 728.6 feet tall.

Recreational maths with 668311162728

• 668311162728 backwards is 827261113866
• The number of decimal digits it has is: 12
• The sum of 668311162728's digits is 51
• More coming soon!