6766777676377 has 2 divisors, whose sum is σ = 6766777676378. Its totient is φ = 6766777676376.

The previous prime is 6766777676371. The next prime is 6766777676473. The reversal of 6766777676377 is 7736767776676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4872036438361 + 1894741238016 = 2207269^2 + 1376496^2 .

It is a cyclic number.

It is not a de Polignac number, because 6766777676377 - 2⁷ = 6766777676249 is a prime.

It is a super-2 number, since 2×6766777676377² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6766777676377.

It is not a weakly prime, because it can be changed into another prime (6766777676371) 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, 3383388838188 + 3383388838189.

It is an arithmetic number, because the mean of its divisors is an integer number (3383388838189).

Almost surely, 2^{6766777676377} is an apocalyptic number.

It is an amenable number.

6766777676377 is a deficient number, since it is larger than the sum of its proper divisors (1).

6766777676377 is an equidigital number, since it uses as much as digits as its factorization.

6766777676377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19211611104, while the sum is 82.

The spelling of 6766777676377 in words is "six trillion, seven hundred sixty-six billion, seven hundred seventy-seven million, six hundred seventy-six thousand, three hundred seventy-seven".