664530212 has 24 divisors (see below), whose sum is σ = 1196387136. Its totient is φ = 322735968.

The previous prime is 664530199. The next prime is 664530247. The reversal of 664530212 is 212035466.

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 7 ways as a sum of consecutive naturals, for example, 91673 + ... + 98655.

It is an arithmetic number, because the mean of its divisors is an integer number (49849464).

Almost surely, 2^664530212 is an apocalyptic number.

It is an amenable number.

664530212 is a deficient number, since it is larger than the sum of its proper divisors (531856924).

664530212 is a wasteful number, since it uses less digits than its factorization.

664530212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7667 (or 7665 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 664530212 is about 25778.4835085387. The cubic root of 664530212 is about 872.6462835763.

Adding to 664530212 its reverse (212035466), we get a palindrome (876565678).

The spelling of 664530212 in words is "six hundred sixty-four million, five hundred thirty thousand, two hundred twelve".