77685858677 has 24 divisors (see below), whose sum is σ = 92899550016. Its totient is φ = 63628475904.

The previous prime is 77685858661. The next prime is 77685858697.

77685858677 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77685858677 - 2⁴ = 77685858661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77685858697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503018 + ... + 639060.

It is an arithmetic number, because the mean of its divisors is an integer number (3870814584).

Almost surely, 2^77685858677 is an apocalyptic number.

It is an amenable number.

77685858677 is a deficient number, since it is larger than the sum of its proper divisors (15213691339).

77685858677 is a wasteful number, since it uses less digits than its factorization.

77685858677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136205 (or 136176 counting only the distinct ones).

The product of its digits is 1106380800, while the sum is 74.

The spelling of 77685858677 in words is "seventy-seven billion, six hundred eighty-five million, eight hundred fifty-eight thousand, six hundred seventy-seven".