Q: What are the prime factors of the number 66,472,812?

 A: 2, 3, 7, 53, 79

Why are those the prime factors of the number 66,472,812?

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 66,472,812

66,472,812
Factor Arrows
233,236,406
Factor Arrows
216,618,203
Factor Arrows
35,539,401
Factor Arrows
31,846,467
Factor Arrows
3615,489
Factor Arrows
3205,163
Factor Arrows
729,309
Factor Arrows
74,187
Factor Arrows
5379

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, 53, 79

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 7 x 7 x 53 x 79 = 66,472,812

This can also be written as 22 x 34 x 72 x 531 x 791 = 66,472,812

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


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