77668685 has 16 divisors (see below), whose sum is σ = 94526976. Its totient is φ = 61259328.

The previous prime is 77668673. The next prime is 77668693. The reversal of 77668685 is 58686677.

It is a cyclic number.

It is not a de Polignac number, because 77668685 - 2⁸ = 77668429 is a prime.

It is a Duffinian number.

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, 127652 + ... + 128258.

It is an arithmetic number, because the mean of its divisors is an integer number (5907936).

Almost surely, 2^77668685 is an apocalyptic number.

It is an amenable number.

77668685 is a deficient number, since it is larger than the sum of its proper divisors (16858291).

77668685 is a wasteful number, since it uses less digits than its factorization.

77668685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its digits is 3386880, while the sum is 53.

The square root of 77668685 is about 8812.9838874243. The cubic root of 77668685 is about 426.6600540832.

The spelling of 77668685 in words is "seventy-seven million, six hundred sixty-eight thousand, six hundred eighty-five".