667706872344 has 16 divisors (see below), whose sum is σ = 1669267180920. Its totient is φ = 222568957440.

The previous prime is 667706872333. The next prime is 667706872369. The reversal of 667706872344 is 443278607766.

667706872344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13910559817 + ... + 13910559864.

Almost surely, 2^667706872344 is an apocalyptic number.

It is an amenable number.

667706872344 is an abundant number, since it is smaller than the sum of its proper divisors (1001560308576).

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

667706872344 is a wasteful number, since it uses less digits than its factorization.

667706872344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27821119690 (or 27821119686 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 60.

The spelling of 667706872344 in words is "six hundred sixty-seven billion, seven hundred six million, eight hundred seventy-two thousand, three hundred forty-four".