664717424818 has 16 divisors (see below), whose sum is σ = 1049605920000. Its totient is φ = 314850521232.

The previous prime is 664717424771. The next prime is 664717424827. The reversal of 664717424818 is 818424717466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360508 + ... + 1208056.

It is an arithmetic number, because the mean of its divisors is an integer number (65600370000).

Almost surely, 2^664717424818 is an apocalyptic number.

664717424818 is a deficient number, since it is larger than the sum of its proper divisors (384888495182).

664717424818 is a wasteful number, since it uses less digits than its factorization.

664717424818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868209.

The product of its digits is 14450688, while the sum is 58.

The spelling of 664717424818 in words is "six hundred sixty-four billion, seven hundred seventeen million, four hundred twenty-four thousand, eight hundred eighteen".