77006660077 has 2 divisors, whose sum is σ = 77006660078. Its totient is φ = 77006660076.

The previous prime is 77006660063. The next prime is 77006660083.

77006660077 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., 76900281481 + 106378596 = 277309^2 + 10314^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 77006660077 - 2³¹ = 74859176429 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77006660677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38503330038 + 38503330039.

It is an arithmetic number, because the mean of its divisors is an integer number (38503330039).

Almost surely, 2^77006660077 is an apocalyptic number.

It is an amenable number.

77006660077 is a deficient number, since it is larger than the sum of its proper divisors (1).

77006660077 is an equidigital number, since it uses as much as digits as its factorization.

77006660077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518616, while the sum is 46.

The spelling of 77006660077 in words is "seventy-seven billion, six million, six hundred sixty thousand, seventy-seven".