77566678859 has 2 divisors, whose sum is σ = 77566678860. Its totient is φ = 77566678858.

The previous prime is 77566678829. The next prime is 77566678883. The reversal of 77566678859 is 95887666577.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77566678859 - 2¹² = 77566674763 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77566678829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38783339429 + 38783339430.

It is an arithmetic number, because the mean of its divisors is an integer number (38783339430).

Almost surely, 2^77566678859 is an apocalyptic number.

77566678859 is a deficient number, since it is larger than the sum of its proper divisors (1).

77566678859 is an equidigital number, since it uses as much as digits as its factorization.

77566678859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1066867200, while the sum is 74.

The spelling of 77566678859 in words is "seventy-seven billion, five hundred sixty-six million, six hundred seventy-eight thousand, eight hundred fifty-nine".