Factors of 664

2, 83. As a product: 2^3 × 83.

The factors of 664 are 1, 2, 4, 8, 83, 166, 332, 664. It has 8 factors.

Factors of 664

Pick any whole number from 1 to 10,000.

664 = 2^{3} \times 83

How to work it out

1
A factor of 664 is a whole number that divides it with nothing left over. You only need to test the numbers up to √664 ≈ 25.77; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 8 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$664 = 2^{3} \times 83$
4
Add all the factors: 1 + 2 + 4 + 8 + 83 + 166 + 332 + 664 = 1260. Without 664 itself that is 596, so 664 is a deficient number.

LaTeX source of the formulas on this page

\[ 664 = 2^{3} \times 83 \]

What are the factors of 664?

The factors of 664 are 1, 2, 4, 8, 83, 166, 332, 664. It has 8 factors.

What are the prime factors of 664?

2, 83. As a product: $2^{3}$ × 83.

How many factors does 664 have?

664 has 8 factors (4 factor pairs).

What is the sum of the factors of 664?

1260.

Is 664 a prime number?

No. It is divisible by 2, so 664 = 2 × 332.