6767377681 has 2 divisors, whose sum is σ = 6767377682. Its totient is φ = 6767377680.

The previous prime is 6767377657. The next prime is 6767377691. The reversal of 6767377681 is 1867737676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4243219600 + 2524158081 = 65140^2 + 50241^2 .

It is a cyclic number.

It is not a de Polignac number, because 6767377681 - 2²⁵ = 6733823249 is a prime.

It is a super-2 number, since 2×6767377681² = 91594801354593875522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6767377691) 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, 3383688840 + 3383688841.

It is an arithmetic number, because the mean of its divisors is an integer number (3383688841).

Almost surely, 2^6767377681 is an apocalyptic number.

It is an amenable number.

6767377681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6767377681 is an equidigital number, since it uses as much as digits as its factorization.

6767377681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12446784, while the sum is 58.

The square root of 6767377681 is about 82264.0728447115. The cubic root of 6767377681 is about 1891.5020003232.

The spelling of 6767377681 in words is "six billion, seven hundred sixty-seven million, three hundred seventy-seven thousand, six hundred eighty-one".