Q: What are the prime factors of the number 664,065,312?

 A: 2, 3, 89, 77723

Why are those the prime factors of the number 664,065,312?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 664,065,312

664,065,312
Factor Arrows
2332,032,656
Factor Arrows
2166,016,328
Factor Arrows
283,008,164
Factor Arrows
241,504,082
Factor Arrows
220,752,041
Factor Arrows
36,917,347
Factor Arrows
8977,723

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 89, 77723

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 89 x 77,723 = 664,065,312

This can also be written as 25 x 31 x 891 x 77,7231 = 664,065,312

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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