664803516044 has 12 divisors (see below), whose sum is σ = 1163719006800. Its totient is φ = 332312371248.

The previous prime is 664803516019. The next prime is 664803516059. The reversal of 664803516044 is 440615308466.

It is a self number, because there is not a number n which added to its sum of digits gives 664803516044.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22329959 + ... + 22359710.

It is an arithmetic number, because the mean of its divisors is an integer number (96976583900).

Almost surely, 2^664803516044 is an apocalyptic number.

It is an amenable number.

664803516044 is a deficient number, since it is larger than the sum of its proper divisors (498915490756).

664803516044 is a wasteful number, since it uses less digits than its factorization.

664803516044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44693392 (or 44693390 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 664803516044 in words is "six hundred sixty-four billion, eight hundred three million, five hundred sixteen thousand, forty-four".