667402057078 has 16 divisors (see below), whose sum is σ = 1063902924864. Its totient is φ = 312912616320.

The previous prime is 667402057067. The next prime is 667402057093. The reversal of 667402057078 is 870750204766.

667402057078 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 7 ways as a sum of consecutive naturals, for example, 36207525 + ... + 36225952.

It is an arithmetic number, because the mean of its divisors is an integer number (66493932804).

Almost surely, 2^667402057078 is an apocalyptic number.

667402057078 is a deficient number, since it is larger than the sum of its proper divisors (396500867786).

667402057078 is a wasteful number, since it uses less digits than its factorization.

667402057078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72433767.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 667402057078 in words is "six hundred sixty-seven billion, four hundred two million, fifty-seven thousand, seventy-eight".