78920668 has 24 divisors (see below), whose sum is σ = 143216640. Its totient is φ = 38013360.

The previous prime is 78920599. The next prime is 78920713. The reversal of 78920668 is 86602987.

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, 28305 + ... + 30967.

It is an arithmetic number, because the mean of its divisors is an integer number (5967360).

Almost surely, 2^78920668 is an apocalyptic number.

It is an amenable number.

78920668 is a deficient number, since it is larger than the sum of its proper divisors (64295972).

78920668 is a wasteful number, since it uses less digits than its factorization.

78920668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937 (or 2935 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 78920668 is about 8883.7305227027. The cubic root of 78920668 is about 428.9403655042.

The spelling of 78920668 in words is "seventy-eight million, nine hundred twenty thousand, six hundred sixty-eight".