678864966 has 32 divisors (see below), whose sum is σ = 1476384000. Its totient is φ = 206851104.

The previous prime is 678864943. The next prime is 678865021. The reversal of 678864966 is 669468876.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 34216 + ... + 50283.

It is an arithmetic number, because the mean of its divisors is an integer number (46137000).

Almost surely, 2^678864966 is an apocalyptic number.

678864966 is an abundant number, since it is smaller than the sum of its proper divisors (797519034).

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

678864966 is a wasteful number, since it uses less digits than its factorization.

678864966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84620.

The product of its digits is 20901888, while the sum is 60.

The square root of 678864966 is about 26055.0372481023. The cubic root of 678864966 is about 878.8763922320.

The spelling of 678864966 in words is "six hundred seventy-eight million, eight hundred sixty-four thousand, nine hundred sixty-six".