668575795631 has 8 divisors (see below), whose sum is σ = 684247072080. Its totient is φ = 652910110272.

The previous prime is 668575795627. The next prime is 668575795709. The reversal of 668575795631 is 136597575866.

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

It is a cyclic number.

It is not a de Polignac number, because 668575795631 - 2² = 668575795627 is a prime.

It is a super-2 number, since 2×668575795631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668575795331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155326 + ... + 1634603.

It is an arithmetic number, because the mean of its divisors is an integer number (85530884010).

Almost surely, 2^668575795631 is an apocalyptic number.

668575795631 is a deficient number, since it is larger than the sum of its proper divisors (15671276449).

668575795631 is a wasteful number, since it uses less digits than its factorization.

668575795631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795545.

The product of its digits is 285768000, while the sum is 68.

The spelling of 668575795631 in words is "six hundred sixty-eight billion, five hundred seventy-five million, seven hundred ninety-five thousand, six hundred thirty-one".