77044376677 has 2 divisors, whose sum is σ = 77044376678. Its totient is φ = 77044376676.

The previous prime is 77044376657. The next prime is 77044376693. The reversal of 77044376677 is 77667344077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76955753281 + 88623396 = 277409^2 + 9414^2 .

It is a cyclic number.

It is not a de Polignac number, because 77044376677 - 2²³ = 77035988069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77044376657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38522188338 + 38522188339.

It is an arithmetic number, because the mean of its divisors is an integer number (38522188339).

Almost surely, 2^77044376677 is an apocalyptic number.

It is an amenable number.

77044376677 is a deficient number, since it is larger than the sum of its proper divisors (1).

77044376677 is an equidigital number, since it uses as much as digits as its factorization.

77044376677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29042496, while the sum is 58.

The spelling of 77044376677 in words is "seventy-seven billion, forty-four million, three hundred seventy-six thousand, six hundred seventy-seven".