664405504466 has 16 divisors (see below), whose sum is σ = 1097369843040. Its totient is φ = 299180047680.

The previous prime is 664405504439. The next prime is 664405504501.

664405504466 is nontrivially palindromic in base 10.

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, 141120311 + ... + 141125018.

It is an arithmetic number, because the mean of its divisors is an integer number (68585615190).

Almost surely, 2^664405504466 is an apocalyptic number.

664405504466 is a deficient number, since it is larger than the sum of its proper divisors (432964338574).

664405504466 is a wasteful number, since it uses less digits than its factorization.

664405504466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282245449.

The product of its (nonzero) digits is 8294400, while the sum is 50.

The spelling of 664405504466 in words is "six hundred sixty-four billion, four hundred five million, five hundred four thousand, four hundred sixty-six".