77665656677 has 16 divisors (see below), whose sum is σ = 89262415872. Its totient is φ = 66195198000.

The previous prime is 77665656667. The next prime is 77665656791.

77665656677 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 77665656677 - 2⁸ = 77665656421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77665656667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030088 + ... + 1102910.

It is an arithmetic number, because the mean of its divisors is an integer number (5578900992).

Almost surely, 2^77665656677 is an apocalyptic number.

It is an amenable number.

77665656677 is a deficient number, since it is larger than the sum of its proper divisors (11596759195).

77665656677 is a wasteful number, since it uses less digits than its factorization.

77665656677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73688.

The product of its digits is 466754400, while the sum is 68.

The spelling of 77665656677 in words is "seventy-seven billion, six hundred sixty-five million, six hundred fifty-six thousand, six hundred seventy-seven".