Q: What are the prime factors of the number 66,700,736?

 A: 2, 23, 113, 401

Why are those the prime factors of the number 66,700,736?

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 66,700,736

66,700,736
Factor Arrows
233,350,368
Factor Arrows
216,675,184
Factor Arrows
28,337,592
Factor Arrows
24,168,796
Factor Arrows
22,084,398
Factor Arrows
21,042,199
Factor Arrows
2345,313
Factor Arrows
113401

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, 23, 113, 401

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 23 x 113 x 401 = 66,700,736

This can also be written as 26 x 231 x 1131 x 4011 = 66,700,736

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


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