668255552866 has 32 divisors (see below), whose sum is σ = 1095167304000. Its totient is φ = 303292250880.

The previous prime is 668255552857. The next prime is 668255552947.

668255552866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 668255552798 and 668255552807.

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, 47694870 + ... + 47708878.

It is an arithmetic number, because the mean of its divisors is an integer number (34223978250).

Almost surely, 2^668255552866 is an apocalyptic number.

668255552866 is a deficient number, since it is larger than the sum of its proper divisors (426911751134).

668255552866 is a wasteful number, since it uses less digits than its factorization.

668255552866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17154.

The product of its digits is 207360000, while the sum is 64.

The spelling of 668255552866 in words is "six hundred sixty-eight billion, two hundred fifty-five million, five hundred fifty-two thousand, eight hundred sixty-six".