664460064466 has 16 divisors (see below), whose sum is σ = 1087330166208. Its totient is φ = 302018446800.

The previous prime is 664460064371. The next prime is 664460064473.

It is a happy number.

664460064466 is nontrivially palindromic in base 10.

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, 356731 + ... + 1206721.

It is an arithmetic number, because the mean of its divisors is an integer number (67958135388).

Almost surely, 2^664460064466 is an apocalyptic number.

664460064466 is a deficient number, since it is larger than the sum of its proper divisors (422870101742).

664460064466 is a wasteful number, since it uses less digits than its factorization.

664460064466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885537.

The product of its (nonzero) digits is 11943936, while the sum is 52.

The spelling of 664460064466 in words is "six hundred sixty-four billion, four hundred sixty million, sixty-four thousand, four hundred sixty-six".