68689766798567 has 2 divisors, whose sum is σ = 68689766798568. Its totient is φ = 68689766798566.

The previous prime is 68689766798557. The next prime is 68689766798687. The reversal of 68689766798567 is 76589766798686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68689766798567 - 2¹² = 68689766794471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68689766798507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34344883399283 + 34344883399284.

It is an arithmetic number, because the mean of its divisors is an integer number (34344883399284).

Almost surely, 2^{68689766798567} is an apocalyptic number.

68689766798567 is a deficient number, since it is larger than the sum of its proper divisors (1).

68689766798567 is an equidigital number, since it uses as much as digits as its factorization.

68689766798567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 553063956480, while the sum is 98.

The spelling of 68689766798567 in words is "sixty-eight trillion, six hundred eighty-nine billion, seven hundred sixty-six million, seven hundred ninety-eight thousand, five hundred sixty-seven".