668464464866 has 8 divisors (see below), whose sum is σ = 1093850942544. Its totient is φ = 303847484020.

The previous prime is 668464464851. The next prime is 668464464929.

668464464866 is nontrivially palindromic in base 10.

668464464866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 668464464796 and 668464464805.

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, 15192374180 + ... + 15192374223.

It is an arithmetic number, because the mean of its divisors is an integer number (136731367818).

Almost surely, 2^668464464866 is an apocalyptic number.

668464464866 is a deficient number, since it is larger than the sum of its proper divisors (425386477678).

668464464866 is a wasteful number, since it uses less digits than its factorization.

668464464866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30384748416.

The product of its digits is 764411904, while the sum is 68.

The spelling of 668464464866 in words is "six hundred sixty-eight billion, four hundred sixty-four million, four hundred sixty-four thousand, eight hundred sixty-six".