668076878 has 32 divisors (see below), whose sum is σ = 1197201600. Its totient is φ = 279323520.

The previous prime is 668076859. The next prime is 668076887. The reversal of 668076878 is 878670866.

668076878 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, 16250 + ... + 40002.

It is an arithmetic number, because the mean of its divisors is an integer number (37412550).

Almost surely, 2^668076878 is an apocalyptic number.

668076878 is a deficient number, since it is larger than the sum of its proper divisors (529124722).

668076878 is a wasteful number, since it uses less digits than its factorization.

668076878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23817 (or 23803 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 56.

The square root of 668076878 is about 25847.1831734137. The cubic root of 668076878 is about 874.1959974605.

The spelling of 668076878 in words is "six hundred sixty-eight million, seventy-six thousand, eight hundred seventy-eight".