Factors / Factors of 66

Factors of 66

1, 2, 3, 6, 11, 22, 33, 66

66 breaks into 4 pairs, tested up to √66 ≈ 8.1; each pair multiplies back to 66 exactly. 66's full pair list is (1, 66), (2, 33), (3, 22), (6, 11), for 8 divisors in total. 66's divisors other than 66 itself sum to 78, 12 above 66: abundant. 66 is even, digit sum 12 for 66; small divisors of 66 include 2, 3, 6, 11. 66 has 8 divisors; 65 has 4 and 67 has 2, so 66 wins here. 66 divided by its largest divisor, 33, gives 2.