68665868797 has 2 divisors, whose sum is σ = 68665868798. Its totient is φ = 68665868796.

The previous prime is 68665868779. The next prime is 68665868911. The reversal of 68665868797 is 79786856686.

Together with previous prime (68665868779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67894640356 + 771228441 = 260566^2 + 27771^2 .

It is a cyclic number.

It is not a de Polignac number, because 68665868797 - 2²³ = 68657480189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68665868707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34332934398 + 34332934399.

It is an arithmetic number, because the mean of its divisors is an integer number (34332934399).

Almost surely, 2^68665868797 is an apocalyptic number.

It is an amenable number.

68665868797 is a deficient number, since it is larger than the sum of its proper divisors (1).

68665868797 is an equidigital number, since it uses as much as digits as its factorization.

68665868797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1463132160, while the sum is 76.

The spelling of 68665868797 in words is "sixty-eight billion, six hundred sixty-five million, eight hundred sixty-eight thousand, seven hundred ninety-seven".