Factors of 668

2, 167. As a product: 2^2 × 167.

The factors of 668 are 1, 2, 4, 167, 334, 668. It has 6 factors.

Factors of 668

Pick any whole number from 1 to 10,000.

668 = 2^{2} \times 167

How to work it out

1
A factor of 668 is a whole number that divides it with nothing left over. You only need to test the numbers up to √668 ≈ 25.85; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 6 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$668 = 2^{2} \times 167$
4
Add all the factors: 1 + 2 + 4 + 167 + 334 + 668 = 1176. Without 668 itself that is 508, so 668 is a deficient number.

LaTeX source of the formulas on this page

\[ 668 = 2^{2} \times 167 \]

What are the factors of 668?

The factors of 668 are 1, 2, 4, 167, 334, 668. It has 6 factors.

What are the prime factors of 668?

2, 167. As a product: $2^{2}$ × 167.

How many factors does 668 have?

668 has 6 factors (3 factor pairs).

What is the sum of the factors of 668?

1176.

Is 668 a prime number?

No. It is divisible by 2, so 668 = 2 × 334.