718434720668 has 24 divisors (see below), whose sum is σ = 1456552588512. Its totient is φ = 303682777344.

The previous prime is 718434720629. The next prime is 718434720683. The reversal of 718434720668 is 866027434817.

It is a super-2 number, since 2×718434720668² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 175740305 + ... + 175744392.

It is an arithmetic number, because the mean of its divisors is an integer number (60689691188).

Almost surely, 2^718434720668 is an apocalyptic number.

It is an amenable number.

718434720668 is an abundant number, since it is smaller than the sum of its proper divisors (738117867844).

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

718434720668 is a wasteful number, since it uses less digits than its factorization.

718434720668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351484781 (or 351484779 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 718434720668 in words is "seven hundred eighteen billion, four hundred thirty-four million, seven hundred twenty thousand, six hundred sixty-eight".