664581417368 has 24 divisors (see below), whose sum is σ = 1369669348740. Its totient is φ = 302082462000.

The previous prime is 664581417349. The next prime is 664581417419. The reversal of 664581417368 is 863714185466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 343274558 + ... + 343276493.

Almost surely, 2^664581417368 is an apocalyptic number.

It is an amenable number.

664581417368 is an abundant number, since it is smaller than the sum of its proper divisors (705087931372).

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

664581417368 is a wasteful number, since it uses less digits than its factorization.

664581417368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686551079 (or 686551064 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 59.

The spelling of 664581417368 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred seventeen thousand, three hundred sixty-eight".