6778871677 has 2 divisors, whose sum is σ = 6778871678. Its totient is φ = 6778871676.

The previous prime is 6778871621. The next prime is 6778871731. The reversal of 6778871677 is 7761788776.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6194634436 + 584237241 = 78706^2 + 24171^2 .

It is a cyclic number.

It is not a de Polignac number, because 6778871677 - 2³¹ = 4631388029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778874677) 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, 3389435838 + 3389435839.

It is an arithmetic number, because the mean of its divisors is an integer number (3389435839).

Almost surely, 2^6778871677 is an apocalyptic number.

It is an amenable number.

6778871677 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778871677 is an equidigital number, since it uses as much as digits as its factorization.

6778871677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38723328, while the sum is 64.

The square root of 6778871677 is about 82333.9035695503. The cubic root of 6778871677 is about 1892.5722632075.

The spelling of 6778871677 in words is "six billion, seven hundred seventy-eight million, eight hundred seventy-one thousand, six hundred seventy-seven".