665355370504 has 64 divisors (see below), whose sum is σ = 1368066600000. Its totient is φ = 300857656320.

The previous prime is 665355370483. The next prime is 665355370517. The reversal of 665355370504 is 405073553566.

It is a super-2 number, since 2×665355370504² (a number of 24 digits) contains 22 as substring.

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, 13720252 + ... + 13768660.

It is an arithmetic number, because the mean of its divisors is an integer number (21376040625).

Almost surely, 2^665355370504 is an apocalyptic number.

It is an amenable number.

665355370504 is an abundant number, since it is smaller than the sum of its proper divisors (702711229496).

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

665355370504 is a wasteful number, since it uses less digits than its factorization.

665355370504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49238 (or 49234 counting only the distinct ones).

The product of its (nonzero) digits is 5670000, while the sum is 49.

The spelling of 665355370504 in words is "six hundred sixty-five billion, three hundred fifty-five million, three hundred seventy thousand, five hundred four".