664938835200 has 324 divisors, whose sum is σ = 2502431917440. Its totient is φ = 167984271360.

The previous prime is 664938835139. The next prime is 664938835247. The reversal of 664938835200 is 2538839466.

664938835200 is a `hidden beast` number, since 6 + 6 + 4 + 9 + 38 + 83 + 520 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 790609 + ... + 1398191.

Almost surely, 2^664938835200 is an apocalyptic number.

664938835200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664938835200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251215958720).

664938835200 is an abundant number, since it is smaller than the sum of its proper divisors (1837493082240).

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

664938835200 is a wasteful number, since it uses less digits than its factorization.

664938835200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607634 (or 607612 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 664938835200 in words is "six hundred sixty-four billion, nine hundred thirty-eight million, eight hundred thirty-five thousand, two hundred".