668590095866 has 64 divisors (see below), whose sum is σ = 1343018880000. Its totient is φ = 246779613360.

The previous prime is 668590095851. The next prime is 668590095889.

668590095866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 668590095796 and 668590095805.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2188256 + ... + 2475003.

It is an arithmetic number, because the mean of its divisors is an integer number (20984670000).

Almost surely, 2^668590095866 is an apocalyptic number.

668590095866 is an abundant number, since it is smaller than the sum of its proper divisors (674428784134).

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

668590095866 is a wasteful number, since it uses less digits than its factorization.

668590095866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663312 (or 4663298 counting only the distinct ones).

The product of its (nonzero) digits is 167961600, while the sum is 68.

The spelling of 668590095866 in words is "six hundred sixty-eight billion, five hundred ninety million, ninety-five thousand, eight hundred sixty-six".