668285582866 has 24 divisors (see below), whose sum is σ = 1159834490640. Its totient is φ = 287778478680.

The previous prime is 668285582851. The next prime is 668285582903.

668285582866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 668285582795 and 668285582804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72666736 + ... + 72675931.

It is an arithmetic number, because the mean of its divisors is an integer number (48326437110).

Almost surely, 2^668285582866 is an apocalyptic number.

668285582866 is a deficient number, since it is larger than the sum of its proper divisors (491548907774).

668285582866 is a wasteful number, since it uses less digits than its factorization.

668285582866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145342710 (or 145342699 counting only the distinct ones).

The product of its digits is 530841600, while the sum is 70.

The spelling of 668285582866 in words is "six hundred sixty-eight billion, two hundred eighty-five million, five hundred eighty-two thousand, eight hundred sixty-six".