668642348365 has 16 divisors (see below), whose sum is σ = 869326527168. Its totient is φ = 491740252416.

The previous prime is 668642348359. The next prime is 668642348383. The reversal of 668642348365 is 563843246866.

668642348365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 668642348365 - 2⁹ = 668642347853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91465887 + ... + 91473196.

It is an arithmetic number, because the mean of its divisors is an integer number (54332907948).

Almost surely, 2^668642348365 is an apocalyptic number.

It is an amenable number.

668642348365 is a deficient number, since it is larger than the sum of its proper divisors (200684178803).

668642348365 is a wasteful number, since it uses less digits than its factorization.

668642348365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182939148.

The product of its digits is 119439360, while the sum is 61.

The spelling of 668642348365 in words is "six hundred sixty-eight billion, six hundred forty-two million, three hundred forty-eight thousand, three hundred sixty-five".