664125663676 has 6 divisors (see below), whose sum is σ = 1162219911440. Its totient is φ = 332062831836.

The previous prime is 664125663659. The next prime is 664125663703. The reversal of 664125663676 is 676366521466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 664125663676.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83015707956 + ... + 83015707963.

Almost surely, 2^664125663676 is an apocalyptic number.

It is an amenable number.

664125663676 is a deficient number, since it is larger than the sum of its proper divisors (498094247764).

664125663676 is a wasteful number, since it uses less digits than its factorization.

664125663676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166031415923 (or 166031415921 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 58.

The spelling of 664125663676 in words is "six hundred sixty-four billion, one hundred twenty-five million, six hundred sixty-three thousand, six hundred seventy-six".