67681818679 has 2 divisors, whose sum is σ = 67681818680. Its totient is φ = 67681818678.

The previous prime is 67681818661. The next prime is 67681818689. The reversal of 67681818679 is 97681818676.

67681818679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67681818679 - 2¹⁷ = 67681687607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67681818629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33840909339 + 33840909340.

It is an arithmetic number, because the mean of its divisors is an integer number (33840909340).

Almost surely, 2^67681818679 is an apocalyptic number.

67681818679 is a deficient number, since it is larger than the sum of its proper divisors (1).

67681818679 is an equidigital number, since it uses as much as digits as its factorization.

67681818679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 67.

The spelling of 67681818679 in words is "sixty-seven billion, six hundred eighty-one million, eight hundred eighteen thousand, six hundred seventy-nine".