Q: What are the prime factors of the number 66,171,648?

 A: 2, 3, 86161

Why are those the prime factors of the number 66,171,648?

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 66,171,648

66,171,648
Factor Arrows
233,085,824
Factor Arrows
216,542,912
Factor Arrows
28,271,456
Factor Arrows
24,135,728
Factor Arrows
22,067,864
Factor Arrows
21,033,932
Factor Arrows
2516,966
Factor Arrows
2258,483
Factor Arrows
386,161

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, 86161

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 2 x 2 x 3 x 86,161 = 66,171,648

This can also be written as 28 x 31 x 86,1611 = 66,171,648

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


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