6776162377921 has 2 divisors, whose sum is σ = 6776162377922. Its totient is φ = 6776162377920.

The previous prime is 6776162377909. The next prime is 6776162377927. The reversal of 6776162377921 is 1297732616776.

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., 6313033130625 + 463129247296 = 2512575^2 + 680536^2 .

It is a cyclic number.

It is not a de Polignac number, because 6776162377921 - 2²⁹ = 6775625507009 is a prime.

It is not a weakly prime, because it can be changed into another prime (6776162377927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388081188960 + 3388081188961.

It is an arithmetic number, because the mean of its divisors is an integer number (3388081188961).

Almost surely, 2^{6776162377921} is an apocalyptic number.

It is an amenable number.

6776162377921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6776162377921 is an equidigital number, since it uses as much as digits as its factorization.

6776162377921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56010528, while the sum is 64.

The spelling of 6776162377921 in words is "six trillion, seven hundred seventy-six billion, one hundred sixty-two million, three hundred seventy-seven thousand, nine hundred twenty-one".