668241225631 has 8 divisors (see below), whose sum is σ = 763919596160. Its totient is φ = 572616689688.

The previous prime is 668241225629. The next prime is 668241225667. The reversal of 668241225631 is 136522142866.

It is a happy number.

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 668241225631 - 2¹ = 668241225629 is a prime.

It is a super-2 number, since 2×668241225631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668241225331) 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, 13432041 + ... + 13481698.

It is an arithmetic number, because the mean of its divisors is an integer number (95489949520).

Almost surely, 2^668241225631 is an apocalyptic number.

668241225631 is a deficient number, since it is larger than the sum of its proper divisors (95678370529).

668241225631 is a wasteful number, since it uses less digits than its factorization.

668241225631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26917293.

The product of its digits is 829440, while the sum is 46.

The spelling of 668241225631 in words is "six hundred sixty-eight billion, two hundred forty-one million, two hundred twenty-five thousand, six hundred thirty-one".