680878866 has 32 divisors (see below), whose sum is σ = 1445169600. Its totient is φ = 213118976.

The previous prime is 680878837. The next prime is 680878871. The reversal of 680878866 is 668878086.

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, 38365 + ... + 53231.

It is an arithmetic number, because the mean of its divisors is an integer number (45161550).

Almost surely, 2^680878866 is an apocalyptic number.

680878866 is an abundant number, since it is smaller than the sum of its proper divisors (764290734).

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

680878866 is a wasteful number, since it uses less digits than its factorization.

680878866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15338.

The product of its (nonzero) digits is 6193152, while the sum is 57.

The square root of 680878866 is about 26093.6556656977. The cubic root of 680878866 is about 879.7446168364.

The spelling of 680878866 in words is "six hundred eighty million, eight hundred seventy-eight thousand, eight hundred sixty-six".