678158664 has 32 divisors (see below), whose sum is σ = 1708753920. Its totient is φ = 224271936.

The previous prime is 678158653. The next prime is 678158693. The reversal of 678158664 is 466851876.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108199 + ... + 114294.

It is an arithmetic number, because the mean of its divisors is an integer number (53398560).

Almost surely, 2^678158664 is an apocalyptic number.

It is an amenable number.

678158664 is an abundant number, since it is smaller than the sum of its proper divisors (1030595256).

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

678158664 is a wasteful number, since it uses less digits than its factorization.

678158664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222629 (or 222625 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 678158664 is about 26041.4796814620. The cubic root of 678158664 is about 878.5714874328.

The spelling of 678158664 in words is "six hundred seventy-eight million, one hundred fifty-eight thousand, six hundred sixty-four".