664031285 has 16 divisors (see below), whose sum is σ = 859239360. Its totient is φ = 490988160.

The previous prime is 664031281. The next prime is 664031309. The reversal of 664031285 is 582130466.

It is not a de Polignac number, because 664031285 - 2² = 664031281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664031281) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 81347 + ... + 89136.

It is an arithmetic number, because the mean of its divisors is an integer number (53702460).

Almost surely, 2^664031285 is an apocalyptic number.

It is an amenable number.

664031285 is a deficient number, since it is larger than the sum of its proper divisors (195208075).

664031285 is a wasteful number, since it uses less digits than its factorization.

664031285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170548.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 664031285 is about 25768.8044930299. The cubic root of 664031285 is about 872.4278356201.

The spelling of 664031285 in words is "six hundred sixty-four million, thirty-one thousand, two hundred eighty-five".