664505466 has 24 divisors (see below), whose sum is σ = 1389312960. Its totient is φ = 211870296.

The previous prime is 664505461. The next prime is 664505509.

It is a happy number.

664505466 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (664505461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101506 + ... + 107853.

It is an arithmetic number, because the mean of its divisors is an integer number (57888040).

Almost surely, 2^664505466 is an apocalyptic number.

664505466 is an abundant number, since it is smaller than the sum of its proper divisors (724807494).

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

664505466 is a wasteful number, since it uses less digits than its factorization.

664505466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209410 (or 209387 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 664505466 is about 25778.0035301417. The cubic root of 664505466 is about 872.6354514764.

The spelling of 664505466 in words is "six hundred sixty-four million, five hundred five thousand, four hundred sixty-six".