6767887681 has 2 divisors, whose sum is σ = 6767887682. Its totient is φ = 6767887680.

The previous prime is 6767887661. The next prime is 6767887751. The reversal of 6767887681 is 1867887676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6743037456 + 24850225 = 82116^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 6767887681 - 2⁵ = 6767887649 is a prime.

It is a super-2 number, since 2×6767887681² = 91608607325263115522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6767887661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3383943840 + 3383943841.

It is an arithmetic number, because the mean of its divisors is an integer number (3383943841).

Almost surely, 2^6767887681 is an apocalyptic number.

It is an amenable number.

6767887681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6767887681 is an equidigital number, since it uses as much as digits as its factorization.

6767887681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37933056, while the sum is 64.

The square root of 6767887681 is about 82267.1725598978. The cubic root of 6767887681 is about 1891.5495146305.

The spelling of 6767887681 in words is "six billion, seven hundred sixty-seven million, eight hundred eighty-seven thousand, six hundred eighty-one".