68066746861 has 2 divisors, whose sum is σ = 68066746862. Its totient is φ = 68066746860.

The previous prime is 68066746831. The next prime is 68066746877. The reversal of 68066746861 is 16864766086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67698836100 + 367910761 = 260190^2 + 19181^2 .

It is a cyclic number.

It is not a de Polignac number, because 68066746861 - 2¹¹ = 68066744813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68066746796 and 68066746805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68066746831) 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, 34033373430 + 34033373431.

It is an arithmetic number, because the mean of its divisors is an integer number (34033373431).

Almost surely, 2^68066746861 is an apocalyptic number.

It is an amenable number.

68066746861 is a deficient number, since it is larger than the sum of its proper divisors (1).

68066746861 is an equidigital number, since it uses as much as digits as its factorization.

68066746861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 68066746861 in words is "sixty-eight billion, sixty-six million, seven hundred forty-six thousand, eight hundred sixty-one".