77606874679 has 2 divisors, whose sum is σ = 77606874680. Its totient is φ = 77606874678.

The previous prime is 77606874649. The next prime is 77606874703. The reversal of 77606874679 is 97647860677.

It is a strong prime.

It is an emirp because it is prime and its reverse (97647860677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77606874679 - 2⁵ = 77606874647 is a prime.

It is a super-2 number, since 2×77606874679² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77606874649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38803437339 + 38803437340.

It is an arithmetic number, because the mean of its divisors is an integer number (38803437340).

Almost surely, 2^77606874679 is an apocalyptic number.

77606874679 is a deficient number, since it is larger than the sum of its proper divisors (1).

77606874679 is an equidigital number, since it uses as much as digits as its factorization.

77606874679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 149361408, while the sum is 67.

The spelling of 77606874679 in words is "seventy-seven billion, six hundred six million, eight hundred seventy-four thousand, six hundred seventy-nine".