664938835199 has 8 divisors (see below), whose sum is σ = 673370525760. Its totient is φ = 656507513376.

The previous prime is 664938835139. The next prime is 664938835247. The reversal of 664938835199 is 991538839466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664938835199 - 2⁸ = 664938834943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664938835109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6550637 + ... + 6651369.

It is an arithmetic number, because the mean of its divisors is an integer number (84171315720).

Almost surely, 2^664938835199 is an apocalyptic number.

664938835199 is a deficient number, since it is larger than the sum of its proper divisors (8431690561).

664938835199 is a wasteful number, since it uses less digits than its factorization.

664938835199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184369.

The product of its digits is 302330880, while the sum is 71.

The spelling of 664938835199 in words is "six hundred sixty-four billion, nine hundred thirty-eight million, eight hundred thirty-five thousand, one hundred ninety-nine".