even, composite, triangular, palindrome · 66th positive integer
The number 66
66 is an even composite number. It is the 66th positive integer.
Quick reference
| Prime factorization | 2 × 3 × 11 |
| Divisors | 1, 2, 3, 6, 11, 22, 33, 66 |
| Binary | 1000010 |
| Hexadecimal | 0x42 |
| Roman numeral | LXVI |
| Digit sum | 12 |
| Properties | even, composite, triangular, palindrome |
Frequently asked
Is 66 a prime number?
No. 66 is composite. Its prime factorization is 2 × 3 × 11.
What are the factors of 66?
The factors (divisors) of 66 are 1, 2, 3, 6, 11, 22, 33, 66.
What is 66 in binary?
66 in binary is 1000010. In hexadecimal it's 42.
What is 66 as a Roman numeral?
66 in Roman numerals is LXVI.
What's the digit sum of 66?
Adding the digits of 66: 6 + 6 = 12.