664606466 has 8 divisors (see below), whose sum is σ = 1055551500. Its totient is φ = 312755968.

The previous prime is 664606421. The next prime is 664606477.

664606466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 661261225 + 3345241 = 25715^2 + 1829^2 .

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

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, 9773591 + ... + 9773658.

Almost surely, 2^664606466 is an apocalyptic number.

664606466 is a deficient number, since it is larger than the sum of its proper divisors (390945034).

664606466 is a wasteful number, since it uses less digits than its factorization.

664606466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19547268.

The product of its (nonzero) digits is 746496, while the sum is 44.

The square root of 664606466 is about 25779.9624902753. The cubic root of 664606466 is about 872.6796606516.

The spelling of 664606466 in words is "six hundred sixty-four million, six hundred six thousand, four hundred sixty-six".