76681011664 has 20 divisors (see below), whose sum is σ = 153692545860. Its totient is φ = 37018419200.

The previous prime is 76681011653. The next prime is 76681011703. The reversal of 76681011664 is 46611018667.

It can be written as a sum of positive squares in 2 ways, for example, as 22652658064 + 54028353600 = 150508^2 + 232440^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82629937 + ... + 82630864.

It is an arithmetic number, because the mean of its divisors is an integer number (7684627293).

Almost surely, 2^76681011664 is an apocalyptic number.

It is an amenable number.

76681011664 is an abundant number, since it is smaller than the sum of its proper divisors (77011534196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

76681011664 is a wasteful number, since it uses less digits than its factorization.

76681011664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165260838 (or 165260832 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 76681011664 in words is "seventy-six billion, six hundred eighty-one million, eleven thousand, six hundred sixty-four".