667978094 has 32 divisors (see below), whose sum is σ = 1200100800. Its totient is φ = 278528544.

The previous prime is 667978067. The next prime is 667978139. The reversal of 667978094 is 490879766.

667978094 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 15 ways as a sum of consecutive naturals, for example, 12224 + ... + 38540.

It is an arithmetic number, because the mean of its divisors is an integer number (37503150).

Almost surely, 2^667978094 is an apocalyptic number.

667978094 is a deficient number, since it is larger than the sum of its proper divisors (532122706).

667978094 is a wasteful number, since it uses less digits than its factorization.

667978094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26377 (or 26363 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 667978094 is about 25845.2721788725. The cubic root of 667978094 is about 874.1529081909.

The spelling of 667978094 in words is "six hundred sixty-seven million, nine hundred seventy-eight thousand, ninety-four".