664908306 has 16 divisors (see below), whose sum is σ = 1399807200. Its totient is φ = 209971008.

The previous prime is 664908289. The next prime is 664908331. The reversal of 664908306 is 603809466.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2916151 + ... + 2916378.

It is an arithmetic number, because the mean of its divisors is an integer number (87487950).

Almost surely, 2^664908306 is an apocalyptic number.

664908306 is an abundant number, since it is smaller than the sum of its proper divisors (734898894).

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

664908306 is a wasteful number, since it uses less digits than its factorization.

664908306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832553.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 664908306 is about 25785.8159847619. The cubic root of 664908306 is about 872.8117537399.

The spelling of 664908306 in words is "six hundred sixty-four million, nine hundred eight thousand, three hundred six".