665677974 has 32 divisors (see below), whose sum is σ = 1434956544. Its totient is φ = 204654240.

The previous prime is 665677951. The next prime is 665677981. The reversal of 665677974 is 479776566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117589 + ... + 123119.

It is an arithmetic number, because the mean of its divisors is an integer number (44842392).

Almost surely, 2^665677974 is an apocalyptic number.

665677974 is an abundant number, since it is smaller than the sum of its proper divisors (769278570).

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

665677974 is a wasteful number, since it uses less digits than its factorization.

665677974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7092.

The product of its digits is 13335840, while the sum is 57.

The square root of 665677974 is about 25800.7359197369. The cubic root of 665677974 is about 873.1483997765.

The spelling of 665677974 in words is "six hundred sixty-five million, six hundred seventy-seven thousand, nine hundred seventy-four".