Q: What are the prime factors of the number 665,010,654?

 A: 2, 3, 7, 11, 61, 3371

Why are those the prime factors of the number 665,010,654?

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 665,010,654

665,010,654
Factor Arrows
2332,505,327
Factor Arrows
3110,835,109
Factor Arrows
715,833,587
Factor Arrows
72,261,941
Factor Arrows
11205,631
Factor Arrows
613,371

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, 7, 11, 61, 3371

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 7 x 11 x 61 x 3,371 = 665,010,654

This can also be written as 21 x 31 x 72 x 111 x 611 x 3,3711 = 665,010,654

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


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