66360391272 has 96 divisors (see below), whose sum is σ = 206298518400. Its totient is φ = 18877283712.

The previous prime is 66360391217. The next prime is 66360391283. The reversal of 66360391272 is 27219306366.

66360391272 is a `hidden beast` number, since 6 + 636 + 0 + 3 + 9 + 1 + 2 + 7 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172068 + ... + 402899.

It is an arithmetic number, because the mean of its divisors is an integer number (2148942900).

Almost surely, 2^66360391272 is an apocalyptic number.

It is an amenable number.

66360391272 is an abundant number, since it is smaller than the sum of its proper divisors (139938127128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66360391272 is a wasteful number, since it uses less digits than its factorization.

66360391272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575215 (or 575208 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 66360391272 in words is "sixty-six billion, three hundred sixty million, three hundred ninety-one thousand, two hundred seventy-two".