66751312 has 20 divisors (see below), whose sum is σ = 130322016. Its totient is φ = 33119840.

The previous prime is 66751303. The next prime is 66751331. The reversal of 66751312 is 21315766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13828 + ... + 18019.

Almost surely, 2^66751312 is an apocalyptic number.

It is an amenable number.

66751312 is a deficient number, since it is larger than the sum of its proper divisors (63570704).

66751312 is a wasteful number, since it uses less digits than its factorization.

66751312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31986 (or 31980 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 66751312 is about 8170.1476118856. The cubic root of 66751312 is about 405.6516704646.

The spelling of 66751312 in words is "sixty-six million, seven hundred fifty-one thousand, three hundred twelve".