77660137967699 has 6 divisors (see below), whose sum is σ = 90339344166564. Its totient is φ = 66565832543700.

The previous prime is 77660137967693. The next prime is 77660137967729. The reversal of 77660137967699 is 99676973106677.

It is a de Polignac number, because none of the positive numbers 2^k-77660137967699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77660137967693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 792450387377 + ... + 792450387474.

It is an arithmetic number, because the mean of its divisors is an integer number (15056557361094).

Almost surely, 2^{77660137967699} is an apocalyptic number.

77660137967699 is a deficient number, since it is larger than the sum of its proper divisors (12679206198865).

77660137967699 is a wasteful number, since it uses less digits than its factorization.

77660137967699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584900774865 (or 1584900774858 counting only the distinct ones).

The product of its (nonzero) digits is 6805279152, while the sum is 83.

The spelling of 77660137967699 in words is "seventy-seven trillion, six hundred sixty billion, one hundred thirty-seven million, nine hundred sixty-seven thousand, six hundred ninety-nine".