No, 66 can be divided by 2, 3, 6, 11, 22, 33, 66
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All even numbers, except 2, are composite.
61 is one.
The first step to finding the factors of a number is to break the number down into its prime factors. In this case, 66 can be broken down as follows: 66 = 2x3x11 To find the other factors (apart from one) you have to multiply any combination of these prime factors together. That gives us the factors of 66 as: 1, 2, 3, 6, 11, 22, 33, 66.
23 is prime, 66 is composite.
The prime factors of 66 are: 2, 3, 11