6777801444881 has 2 divisors, whose sum is σ = 6777801444882. Its totient is φ = 6777801444880.

The previous prime is 6777801444823. The next prime is 6777801444913. The reversal of 6777801444881 is 1884441087776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5479386774481 + 1298414670400 = 2340809^2 + 1139480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6777801444881 is a prime.

It is a super-2 number, since 2×6777801444881² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6777801444581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388900722440 + 3388900722441.

It is an arithmetic number, because the mean of its divisors is an integer number (3388900722441).

Almost surely, 2^{6777801444881} is an apocalyptic number.

It is an amenable number.

6777801444881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6777801444881 is an equidigital number, since it uses as much as digits as its factorization.

6777801444881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67436544, while the sum is 65.

The spelling of 6777801444881 in words is "six trillion, seven hundred seventy-seven billion, eight hundred one million, four hundred forty-four thousand, eight hundred eighty-one".