665425874992 has 60 divisors (see below), whose sum is σ = 1301545194040. Its totient is φ = 329572189440.

The previous prime is 665425874989. The next prime is 665425875001. The reversal of 665425874992 is 299478524566.

It is a super-2 number, since 2×665425874992² (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 11 ways as a sum of consecutive naturals, for example, 176550484 + ... + 176554252.

Almost surely, 2^665425874992 is an apocalyptic number.

It is an amenable number.

665425874992 is a deficient number, since it is larger than the sum of its proper divisors (636119319048).

665425874992 is a wasteful number, since it uses less digits than its factorization.

665425874992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682 (or 4545 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 67.

The spelling of 665425874992 in words is "six hundred sixty-five billion, four hundred twenty-five million, eight hundred seventy-four thousand, nine hundred ninety-two".