664203612 has 12 divisors (see below), whose sum is σ = 1549808456. Its totient is φ = 221401200.

The previous prime is 664203611. The next prime is 664203641. The reversal of 664203612 is 216302466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 664203612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664203611) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 27675139 + ... + 27675162.

Almost surely, 2^664203612 is an apocalyptic number.

It is an amenable number.

664203612 is an abundant number, since it is smaller than the sum of its proper divisors (885604844).

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

664203612 is a wasteful number, since it uses less digits than its factorization.

664203612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55350308 (or 55350306 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 664203612 is about 25772.1479896418. The cubic root of 664203612 is about 872.5032988658.

The spelling of 664203612 in words is "six hundred sixty-four million, two hundred three thousand, six hundred twelve".