Is 668 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
For 668, the answer is: No, 668 is not a prime number.
The list of all positive divisors (i.e., the list of all integers that divide 668) is as follows: 1, 2, 4, 167, 334, 668.
For 668 to be a prime number, it would have been required that 668 has only two divisors, i.e., itself and 1.
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As a consequence:
- 668 is a multiple of 1
- 668 is a multiple of 2
- 668 is a multiple of 4
- 668 is a multiple of 167
- 668 is a multiple of 334
For 668 to be a prime number, it would have been required that 668 has only two divisors, i.e., itself and 1.
Is 668 a deficient number?
Yes, 668 is a deficient number, that is to say 668 is a natural number that is strictly larger than the sum of its proper divisors, i.e., the divisors of 668 without 668 itself (that is 1 + 2 + 4 + 167 + 334 = 508).