665162157204 has 36 divisors (see below), whose sum is σ = 1743655533984. Its totient is φ = 221720718744.

The previous prime is 665162157173. The next prime is 665162157217. The reversal of 665162157204 is 402751261566.

665162157204 is a `hidden beast` number, since 6 + 6 + 51 + 6 + 21 + 572 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 665162157204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342160632 + ... + 342162575.

It is an arithmetic number, because the mean of its divisors is an integer number (48434875944).

Almost surely, 2^665162157204 is an apocalyptic number.

It is an amenable number.

665162157204 is an abundant number, since it is smaller than the sum of its proper divisors (1078493376780).

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

665162157204 is a wasteful number, since it uses less digits than its factorization.

665162157204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684323226 (or 684323212 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 665162157204 in words is "six hundred sixty-five billion, one hundred sixty-two million, one hundred fifty-seven thousand, two hundred four".