668953359866 has 16 divisors (see below), whose sum is σ = 1094949111168. Its totient is φ = 303986887200.

The previous prime is 668953359857. The next prime is 668953359881.

668953359866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 668953359793 and 668953359802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4058450 + ... + 4220061.

It is an arithmetic number, because the mean of its divisors is an integer number (68434319448).

Almost surely, 2^668953359866 is an apocalyptic number.

668953359866 is a deficient number, since it is larger than the sum of its proper divisors (425995751302).

668953359866 is a wasteful number, since it uses less digits than its factorization.

668953359866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8282197.

The product of its digits is 1511654400, while the sum is 74.

The spelling of 668953359866 in words is "six hundred sixty-eight billion, nine hundred fifty-three million, three hundred fifty-nine thousand, eight hundred sixty-six".