665274795680 has 96 divisors (see below), whose sum is σ = 1769904235008. Its totient is φ = 234114278400.

The previous prime is 665274795667. The next prime is 665274795701. The reversal of 665274795680 is 86597472566.

It is a super-3 number, since 3×665274795680³ (a number of 36 digits) contains 333 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, 6042167 + ... + 6151286.

It is an arithmetic number, because the mean of its divisors is an integer number (18436502448).

Almost surely, 2^665274795680 is an apocalyptic number.

It is an amenable number.

665274795680 is an abundant number, since it is smaller than the sum of its proper divisors (1104629439328).

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

665274795680 is a wasteful number, since it uses less digits than its factorization.

665274795680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12193510 (or 12193502 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 65.

The spelling of 665274795680 in words is "six hundred sixty-five billion, two hundred seventy-four million, seven hundred ninety-five thousand, six hundred eighty".