664382500 has 120 divisors (see below), whose sum is σ = 1558751040. Its totient is φ = 246960000.

The previous prime is 664382497. The next prime is 664382501. The reversal of 664382500 is 5283466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (664382501) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3372402 + ... + 3372598.

It is an arithmetic number, because the mean of its divisors is an integer number (12989592).

Almost surely, 2^664382500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664382500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779375520).

664382500 is an abundant number, since it is smaller than the sum of its proper divisors (894368540).

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

664382500 is a wasteful number, since it uses less digits than its factorization.

664382500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 664382500 is about 25775.6183243002. The cubic root of 664382500 is about 872.5816214148.

The spelling of 664382500 in words is "six hundred sixty-four million, three hundred eighty-two thousand, five hundred".