680868688868 has 24 divisors (see below), whose sum is σ = 1199637190080. Its totient is φ = 338119843040.

The previous prime is 680868688861. The next prime is 680868688873. The reversal of 680868688868 is 868886868086.

It is a junction number, because it is equal to n+sod(n) for n = 680868688792 and 680868688801.

It is not an unprimeable number, because it can be changed into a prime (680868688861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8705 + ... + 1166967.

It is an arithmetic number, because the mean of its divisors is an integer number (49984882920).

Almost surely, 2^680868688868 is an apocalyptic number.

It is an amenable number.

680868688868 is a deficient number, since it is larger than the sum of its proper divisors (518768501212).

680868688868 is a wasteful number, since it uses less digits than its factorization.

680868688868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159267 (or 1159265 counting only the distinct ones).

The product of its (nonzero) digits is 2717908992, while the sum is 80.

The spelling of 680868688868 in words is "six hundred eighty billion, eight hundred sixty-eight million, six hundred eighty-eight thousand, eight hundred sixty-eight".