77656265677 has 2 divisors, whose sum is σ = 77656265678. Its totient is φ = 77656265676.

The previous prime is 77656265657. The next prime is 77656265683.

77656265677 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44260165161 + 33396100516 = 210381^2 + 182746^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77656265677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77656265657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38828132838 + 38828132839.

It is an arithmetic number, because the mean of its divisors is an integer number (38828132839).

Almost surely, 2^77656265677 is an apocalyptic number.

It is an amenable number.

77656265677 is a deficient number, since it is larger than the sum of its proper divisors (1).

77656265677 is an equidigital number, since it uses as much as digits as its factorization.

77656265677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155584800, while the sum is 64.

The spelling of 77656265677 in words is "seventy-seven billion, six hundred fifty-six million, two hundred sixty-five thousand, six hundred seventy-seven".