68746186664 has 16 divisors (see below), whose sum is σ = 128902766100. Its totient is φ = 34372115712.

The previous prime is 68746186643. The next prime is 68746186679. The reversal of 68746186664 is 46668164786.

It can be written as a sum of positive squares in 2 ways, for example, as 67838369764 + 907816900 = 260458^2 + 30130^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68746186597 and 68746186606.

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, 239702 + ... + 441530.

Almost surely, 2^68746186664 is an apocalyptic number.

It is an amenable number.

68746186664 is a deficient number, since it is larger than the sum of its proper divisors (60156579436).

68746186664 is a wasteful number, since it uses less digits than its factorization.

68746186664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244412 (or 244408 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 62.

The spelling of 68746186664 in words is "sixty-eight billion, seven hundred forty-six million, one hundred eighty-six thousand, six hundred sixty-four".