668869968866 has 8 divisors (see below), whose sum is σ = 1094514494544. Its totient is φ = 304031804020.

The previous prime is 668869968841. The next prime is 668869968881.

668869968866 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15201590180 + ... + 15201590223.

It is an arithmetic number, because the mean of its divisors is an integer number (136814311818).

Almost surely, 2^668869968866 is an apocalyptic number.

668869968866 is a deficient number, since it is larger than the sum of its proper divisors (425644525678).

668869968866 is a wasteful number, since it uses less digits than its factorization.

668869968866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30403180416.

The product of its digits is 15479341056, while the sum is 86.

The spelling of 668869968866 in words is "six hundred sixty-eight billion, eight hundred sixty-nine million, nine hundred sixty-eight thousand, eight hundred sixty-six".