No, 64 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
64 has divisors other than 1 and itself. The smallest is 2: 64 ÷ 2 = 32.
Prime factorization: 64 = 2 × 2 × 2 × 2 × 2 × 2 = 2⁶.
| Number | Prime? |
|---|---|
| 60 | No, 2 × 2 × 3 × 5 |
| 61 | Yes |
| 62 | No, 2 × 31 |
| 63 | No, 3 × 3 × 7 |
| 65 | No, 5 × 13 |
| 66 | No, 2 × 3 × 11 |
| 67 | Yes |
| 68 | No, 2 × 2 × 17 |
More about 64: factors of 64 · 64 squared · square root of 64 · 64 in binary · 64 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.