668376767673866 has 16 divisors (see below), whose sum is σ = 1055337776683200. Its totient is φ = 316597710054528.

The previous prime is 668376767673841. The next prime is 668376767673877.

668376767673866 is nontrivially palindromic in base 10.

668376767673866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 43578215 + ... + 56884218.

It is an arithmetic number, because the mean of its divisors is an integer number (65958611042700).

Almost surely, 2^{668376767673866} is an apocalyptic number.

668376767673866 is a deficient number, since it is larger than the sum of its proper divisors (386961009009334).

668376767673866 is a wasteful number, since it uses less digits than its factorization.

668376767673866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100637533.

The product of its digits is 387144769536, while the sum is 92.

The spelling of 668376767673866 in words is "six hundred sixty-eight trillion, three hundred seventy-six billion, seven hundred sixty-seven million, six hundred seventy-three thousand, eight hundred sixty-six".