Q: What are the prime factors of the number 66,650,320?

 A: 2, 5, 11, 23, 37, 89

Why are those the prime factors of the number 66,650,320?

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 66,650,320

66,650,320
Factor Arrows
233,325,160
Factor Arrows
216,662,580
Factor Arrows
28,331,290
Factor Arrows
24,165,645
Factor Arrows
5833,129
Factor Arrows
1175,739
Factor Arrows
233,293
Factor Arrows
3789

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, 5, 11, 23, 37, 89

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 11 x 23 x 37 x 89 = 66,650,320

This can also be written as 24 x 51 x 111 x 231 x 371 x 891 = 66,650,320

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


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