664445530 has 16 divisors (see below), whose sum is σ = 1366859520. Its totient is φ = 227809872.

The previous prime is 664445513. The next prime is 664445543. The reversal of 664445530 is 35544466.

664445530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 664445530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4745970 + ... + 4746109.

It is an arithmetic number, because the mean of its divisors is an integer number (85428720).

Almost surely, 2^664445530 is an apocalyptic number.

664445530 is an abundant number, since it is smaller than the sum of its proper divisors (702413990).

664445530 is a wasteful number, since it uses less digits than its factorization.

664445530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492093.

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 664445530 is about 25776.8409623833. The cubic root of 664445530 is about 872.6092144958.

Adding to 664445530 its reverse (35544466), we get a palindrome (699989996).

The spelling of 664445530 in words is "six hundred sixty-four million, four hundred forty-five thousand, five hundred thirty".