66734074000681 has 2 divisors, whose sum is σ = 66734074000682. Its totient is φ = 66734074000680.

The previous prime is 66734074000661. The next prime is 66734074000799. The reversal of 66734074000681 is 18600047043766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51585203456656 + 15148870544025 = 7182284^2 + 3892155^2 .

It is a cyclic number.

It is not a de Polignac number, because 66734074000681 - 2¹¹ = 66734073998633 is a prime.

It is a super-2 number, since 2×66734074000681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66734074000661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367037000340 + 33367037000341.

It is an arithmetic number, because the mean of its divisors is an integer number (33367037000341).

Almost surely, 2^{66734074000681} is an apocalyptic number.

It is an amenable number.

66734074000681 is a deficient number, since it is larger than the sum of its proper divisors (1).

66734074000681 is an equidigital number, since it uses as much as digits as its factorization.

66734074000681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 66734074000681 in words is "sixty-six trillion, seven hundred thirty-four billion, seventy-four million, six hundred eighty-one", and thus it is an aban number.