No, 65 is not a prime number. It is a composite number: it ends in 5, so it is divisible by 5.
65 has divisors other than 1 and itself. The smallest is 5: 65 ÷ 5 = 13.
Prime factorization: 65 = 5 × 13.
| Number | Prime? |
|---|---|
| 61 | Yes |
| 62 | No, 2 × 31 |
| 63 | No, 3 × 3 × 7 |
| 64 | No, 2 × 2 × 2 × 2 × 2 × 2 |
| 66 | No, 2 × 3 × 11 |
| 67 | Yes |
| 68 | No, 2 × 2 × 17 |
| 69 | No, 3 × 23 |
More about 65: factors of 65 · 65 squared · square root of 65 · 65 in binary · 65 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.