77912166120 has 64 divisors (see below), whose sum is σ = 239172246720. Its totient is φ = 20293400064.

The previous prime is 77912166089. The next prime is 77912166169. The reversal of 77912166120 is 2166121977.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7544469 + ... + 7554788.

It is an arithmetic number, because the mean of its divisors is an integer number (3737066355).

Almost surely, 2^77912166120 is an apocalyptic number.

It is an amenable number.

77912166120 is an abundant number, since it is smaller than the sum of its proper divisors (161260080600).

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

77912166120 is a wasteful number, since it uses less digits than its factorization.

77912166120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15099314 (or 15099310 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The spelling of 77912166120 in words is "seventy-seven billion, nine hundred twelve million, one hundred sixty-six thousand, one hundred twenty".