To determine if 6639 is a prime number or a composite number, we simply look at the factors for 6639.
If the factors of 6639 are only 6639 and 1, then we know that 6639 is a prime number. Otherwise, 6639 is a composite number.
To explain better, if 6639 is only divisible by 1 and 6639, then it is a prime number, and if 6639 is divisible by more than 6639 and 1, then it is a composite number.
The factors of 6639 are as follows:
1, 3, 2213, 6639
Therefore, since 6639 is divisible by more than one and itself, the answer to the
question "Is 6639 prime or composite?" is highlighted in blue below.
composite
Is 6640 prime or composite?
OK. Now you know that 6639 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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