668319198334 has 8 divisors (see below), whose sum is σ = 1025792258040. Its totient is φ = 326388445656.

The previous prime is 668319198311. The next prime is 668319198341. The reversal of 668319198334 is 433891913866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3885576649 + ... + 3885576820.

It is an arithmetic number, because the mean of its divisors is an integer number (128224032255).

Almost surely, 2^668319198334 is an apocalyptic number.

668319198334 is a deficient number, since it is larger than the sum of its proper divisors (357473059706).

668319198334 is a wasteful number, since it uses less digits than its factorization.

668319198334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771153514.

The product of its digits is 20155392, while the sum is 61.

The spelling of 668319198334 in words is "six hundred sixty-eight billion, three hundred nineteen million, one hundred ninety-eight thousand, three hundred thirty-four".