165404312664 has 32 divisors (see below), whose sum is σ = 421312875120. Its totient is φ = 54094491776.

The previous prime is 165404312657. The next prime is 165404312779. The reversal of 165404312664 is 466213404561.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 65016147 + ... + 65018690.

Almost surely, 2^165404312664 is an apocalyptic number.

It is an amenable number.

165404312664 is an abundant number, since it is smaller than the sum of its proper divisors (255908562456).

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

165404312664 is a wasteful number, since it uses less digits than its factorization.

165404312664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130034899 (or 130034895 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 165404312664 in words is "one hundred sixty-five billion, four hundred four million, three hundred twelve thousand, six hundred sixty-four".