66979272 has 32 divisors (see below), whose sum is σ = 168163200. Its totient is φ = 22231104.

The previous prime is 66979259. The next prime is 66979327. The reversal of 66979272 is 27297966.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103 + ... + 11574.

It is an arithmetic number, because the mean of its divisors is an integer number (5255100).

Almost surely, 2^66979272 is an apocalyptic number.

It is an amenable number.

66979272 is an abundant number, since it is smaller than the sum of its proper divisors (101183928).

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

66979272 is a wasteful number, since it uses less digits than its factorization.

66979272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11925 (or 11921 counting only the distinct ones).

The product of its digits is 571536, while the sum is 48.

The square root of 66979272 is about 8184.0865098067. The cubic root of 66979272 is about 406.1129212623.

The spelling of 66979272 in words is "sixty-six million, nine hundred seventy-nine thousand, two hundred seventy-two".