664828466 has 4 divisors (see below), whose sum is σ = 997242702. Its totient is φ = 332414232.

The previous prime is 664828457. The next prime is 664828477.

664828466 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 369985225 + 294843241 = 19235^2 + 17171^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166207115 + ... + 166207118.

Almost surely, 2^664828466 is an apocalyptic number.

664828466 is a deficient number, since it is larger than the sum of its proper divisors (332414236).

664828466 is a wasteful number, since it uses less digits than its factorization.

664828466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332414235.

The product of its digits is 2654208, while the sum is 50.

The square root of 664828466 is about 25784.2678003468. The cubic root of 664828466 is about 872.7768175544.

The spelling of 664828466 in words is "six hundred sixty-four million, eight hundred twenty-eight thousand, four hundred sixty-six".