67868730817 has 2 divisors, whose sum is σ = 67868730818. Its totient is φ = 67868730816.

The previous prime is 67868730799. The next prime is 67868730821. The reversal of 67868730817 is 71803786876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56979599616 + 10889131201 = 238704^2 + 104351^2 .

It is a cyclic number.

It is not a de Polignac number, because 67868730817 - 2⁷ = 67868730689 is a prime.

It is not a weakly prime, because it can be changed into another prime (67868730857) 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, 33934365408 + 33934365409.

It is an arithmetic number, because the mean of its divisors is an integer number (33934365409).

Almost surely, 2^67868730817 is an apocalyptic number.

It is an amenable number.

67868730817 is a deficient number, since it is larger than the sum of its proper divisors (1).

67868730817 is an equidigital number, since it uses as much as digits as its factorization.

67868730817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18966528, while the sum is 61.

The spelling of 67868730817 in words is "sixty-seven billion, eight hundred sixty-eight million, seven hundred thirty thousand, eight hundred seventeen".