664581416336 has 40 divisors (see below), whose sum is σ = 1300038444000. Its totient is φ = 329092230656.

The previous prime is 664581416333. The next prime is 664581416351. The reversal of 664581416336 is 633614185466.

It is not an unprimeable number, because it can be changed into a prime (664581416333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2176415 + ... + 2462913.

It is an arithmetic number, because the mean of its divisors is an integer number (32500961100).

Almost surely, 2^664581416336 is an apocalyptic number.

It is an amenable number.

664581416336 is a deficient number, since it is larger than the sum of its proper divisors (635457027664).

664581416336 is a wasteful number, since it uses less digits than its factorization.

664581416336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287903 (or 287897 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 53.

The spelling of 664581416336 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred sixteen thousand, three hundred thirty-six".