6776755813 has 2 divisors, whose sum is σ = 6776755814. Its totient is φ = 6776755812.

The previous prime is 6776755787. The next prime is 6776755819. The reversal of 6776755813 is 3185576776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4507376769 + 2269379044 = 67137^2 + 47638^2 .

It is a cyclic number.

It is not a de Polignac number, because 6776755813 - 2¹⁷ = 6776624741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6776755819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388377906 + 3388377907.

It is an arithmetic number, because the mean of its divisors is an integer number (3388377907).

Almost surely, 2^6776755813 is an apocalyptic number.

It is an amenable number.

6776755813 is a deficient number, since it is larger than the sum of its proper divisors (1).

6776755813 is an equidigital number, since it uses as much as digits as its factorization.

6776755813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7408800, while the sum is 55.

The square root of 6776755813 is about 82321.0532792189. The cubic root of 6776755813 is about 1892.3753355371.

The spelling of 6776755813 in words is "six billion, seven hundred seventy-six million, seven hundred fifty-five thousand, eight hundred thirteen".