664528300 has 72 divisors (see below), whose sum is σ = 1559525184. Its totient is φ = 244823040.

The previous prime is 664528297. The next prime is 664528303. The reversal of 664528300 is 3825466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (664528297) and next prime (664528303).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (664528303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75742 + ... + 84058.

It is an arithmetic number, because the mean of its divisors is an integer number (21660072).

Almost surely, 2^664528300 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 664528300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779762592).

664528300 is an abundant number, since it is smaller than the sum of its proper divisors (894996884).

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

664528300 is a wasteful number, since it uses less digits than its factorization.

664528300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8395 (or 8388 counting only the distinct ones).

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

The square root of 664528300 is about 25778.4464233204. The cubic root of 664528300 is about 872.6454466436.

The spelling of 664528300 in words is "six hundred sixty-four million, five hundred twenty-eight thousand, three hundred".