77660878836 has 48 divisors (see below), whose sum is σ = 181677888000. Its totient is φ = 25819997280.

The previous prime is 77660878819. The next prime is 77660878859. The reversal of 77660878836 is 63887806677.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20614225 + ... + 20617991.

It is an arithmetic number, because the mean of its divisors is an integer number (3784956000).

Almost surely, 2^77660878836 is an apocalyptic number.

It is an amenable number.

77660878836 is an abundant number, since it is smaller than the sum of its proper divisors (104017009164).

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

77660878836 is a wasteful number, since it uses less digits than its factorization.

77660878836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764 (or 7762 counting only the distinct ones).

The product of its (nonzero) digits is 113799168, while the sum is 66.

The spelling of 77660878836 in words is "seventy-seven billion, six hundred sixty million, eight hundred seventy-eight thousand, eight hundred thirty-six".