66979074 has 16 divisors (see below), whose sum is σ = 134551008. Its totient is φ = 22227552.

The previous prime is 66979069. The next prime is 66979093. The reversal of 66979074 is 47097966.

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, 23227 + ... + 25950.

It is an arithmetic number, because the mean of its divisors is an integer number (8409438).

Almost surely, 2^66979074 is an apocalyptic number.

66979074 is an abundant number, since it is smaller than the sum of its proper divisors (67571934).

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

66979074 is a wasteful number, since it uses less digits than its factorization.

66979074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49409.

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

The square root of 66979074 is about 8184.0744131514. The cubic root of 66979074 is about 406.1125210866.

The spelling of 66979074 in words is "sixty-six million, nine hundred seventy-nine thousand, seventy-four".