665106400672 has 48 divisors (see below), whose sum is σ = 1496606956992. Its totient is φ = 285023208960.

The previous prime is 665106400667. The next prime is 665106400709. The reversal of 665106400672 is 276004601566.

It is a happy number.

665106400672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2917047 + ... + 3136777.

It is an arithmetic number, because the mean of its divisors is an integer number (31179311604).

Almost surely, 2^665106400672 is an apocalyptic number.

It is an amenable number.

665106400672 is an abundant number, since it is smaller than the sum of its proper divisors (831500556320).

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

665106400672 is a wasteful number, since it uses less digits than its factorization.

665106400672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233261 (or 233253 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 665106400672 in words is "six hundred sixty-five billion, one hundred six million, four hundred thousand, six hundred seventy-two".