664686466 has 8 divisors (see below), whose sum is σ = 997211664. Its totient is φ = 332282580.

The previous prime is 664686437. The next prime is 664686479.

664686466 is nontrivially palindromic in base 10.

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, 15100 + ... + 39463.

It is an arithmetic number, because the mean of its divisors is an integer number (124651458).

Almost surely, 2^664686466 is an apocalyptic number.

664686466 is a deficient number, since it is larger than the sum of its proper divisors (332525198).

664686466 is a wasteful number, since it uses less digits than its factorization.

664686466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60656.

The product of its digits is 5971968, while the sum is 52.

The square root of 664686466 is about 25781.5140362237. The cubic root of 664686466 is about 872.7146746412.

The spelling of 664686466 in words is "six hundred sixty-four million, six hundred eighty-six thousand, four hundred sixty-six".