76686633668668 has 24 divisors (see below), whose sum is σ = 134748286817760. Its totient is φ = 38187201950400.

The previous prime is 76686633668647. The next prime is 76686633668669. The reversal of 76686633668668 is 86686633668667.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76686633668669) 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, 5954703 + ... + 13741606.

It is an arithmetic number, because the mean of its divisors is an integer number (5614511950740).

Almost surely, 2^{76686633668668} is an apocalyptic number.

It is an amenable number.

76686633668668 is a deficient number, since it is larger than the sum of its proper divisors (58061653149092).

76686633668668 is a wasteful number, since it uses less digits than its factorization.

76686633668668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19700277 (or 19700275 counting only the distinct ones).

The product of its digits is 54177693696, while the sum is 85.

Subtracting 76686633668668 from its reverse (86686633668667), we obtain a palindrome (9999999999999).

The spelling of 76686633668668 in words is "seventy-six trillion, six hundred eighty-six billion, six hundred thirty-three million, six hundred sixty-eight thousand, six hundred sixty-eight".