77666164 has 24 divisors (see below), whose sum is σ = 138983040. Its totient is φ = 37966656.

The previous prime is 77666159. The next prime is 77666179. The reversal of 77666164 is 46166677.

It is a self number, because there is not a number n which added to its sum of digits gives 77666164.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32664 + ... + 34960.

It is an arithmetic number, because the mean of its divisors is an integer number (5790960).

Almost surely, 2^77666164 is an apocalyptic number.

It is an amenable number.

77666164 is a deficient number, since it is larger than the sum of its proper divisors (61316876).

77666164 is a wasteful number, since it uses less digits than its factorization.

77666164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487 (or 2485 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 77666164 is about 8812.8408586562. The cubic root of 77666164 is about 426.6554378013.

The spelling of 77666164 in words is "seventy-seven million, six hundred sixty-six thousand, one hundred sixty-four".