665637853232 has 40 divisors (see below), whose sum is σ = 1407628031040. Its totient is φ = 302409615680.

The previous prime is 665637853211. The next prime is 665637853241. The reversal of 665637853232 is 232358736566.

665637853232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 607238 + ... + 1303845.

It is an arithmetic number, because the mean of its divisors is an integer number (35190700776).

Almost surely, 2^665637853232 is an apocalyptic number.

It is an amenable number.

665637853232 is an abundant number, since it is smaller than the sum of its proper divisors (741990177808).

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

665637853232 is a wasteful number, since it uses less digits than its factorization.

665637853232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913081 (or 1913075 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 56.

The spelling of 665637853232 in words is "six hundred sixty-five billion, six hundred thirty-seven million, eight hundred fifty-three thousand, two hundred thirty-two".