Q: What are the prime factors of the number 666,600?

 A: 2, 3, 5, 11, 101

Why are those the prime factors of the number 666,600?

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 666,600

666,600
Factor Arrows
2333,300
Factor Arrows
2166,650
Factor Arrows
283,325
Factor Arrows
327,775
Factor Arrows
55,555
Factor Arrows
51,111
Factor Arrows
11101

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, 5, 11, 101

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 5 x 11 x 101 = 666,600

This can also be written as 23 x 31 x 52 x 111 x 1011 = 666,600

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


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