The prime factorization of 663 is:
$$ 663 = 3\cdot13\cdot17 $$Prime factorization can be nicely visualized by creating a factorization tree.
| 663 can be written as 3 × 221. |
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| 221 can be written as 13 × 17. |
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| The end nodes are the prime factors of the number 663. |
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