664730000 has 100 divisors (see below), whose sum is σ = 1755975408. Its totient is φ = 241680000.

The previous prime is 664729999. The next prime is 664730057. The reversal of 664730000 is 37466.

It is a tau number, because it is divible by the number of its divisors (100).

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 19 ways as a sum of consecutive naturals, for example, 106979 + ... + 113021.

Almost surely, 2^664730000 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 664730000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877987704).

664730000 is an abundant number, since it is smaller than the sum of its proper divisors (1091245408).

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

664730000 is a wasteful number, since it uses less digits than its factorization.

664730000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082 (or 6061 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 664730000 is about 25782.3583095108. The cubic root of 664730000 is about 872.7337271987.

Adding to 664730000 its reverse (37466), we get a palindrome (664767466).

The spelling of 664730000 in words is "six hundred sixty-four million, seven hundred thirty thousand".