664203215 has 16 divisors (see below), whose sum is σ = 861123648. Its totient is φ = 488906496.

The previous prime is 664203203. The next prime is 664203257. The reversal of 664203215 is 512302466.

It is not a de Polignac number, because 664203215 - 2⁶ = 664203151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4022 + ... + 36668.

It is an arithmetic number, because the mean of its divisors is an integer number (53820228).

Almost surely, 2^664203215 is an apocalyptic number.

664203215 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664203215 is a deficient number, since it is larger than the sum of its proper divisors (196920433).

664203215 is a wasteful number, since it uses less digits than its factorization.

664203215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32978.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 664203215 is about 25772.1402875275. The cubic root of 664203215 is about 872.5031250316.

The spelling of 664203215 in words is "six hundred sixty-four million, two hundred three thousand, two hundred fifteen".