664004466 has 20 divisors (see below), whose sum is σ = 1487862222. Its totient is φ = 221334768.

The previous prime is 664004449. The next prime is 664004477. The reversal of 664004466 is 664400466.

It is a happy number.

664004466 is a `hidden beast` number, since 6 + 640 + 0 + 4 + 4 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 541260225 + 122744241 = 23265^2 + 11079^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 664004466.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2049235 + ... + 2049558.

Almost surely, 2^664004466 is an apocalyptic number.

664004466 is an abundant number, since it is smaller than the sum of its proper divisors (823857756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664004466 is a wasteful number, since it uses less digits than its factorization.

664004466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098807 (or 4098798 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 664004466 is about 25768.2841105107. The cubic root of 664004466 is about 872.4160902110.

The spelling of 664004466 in words is "six hundred sixty-four million, four thousand, four hundred sixty-six".