66667400074069 has 2 divisors, whose sum is σ = 66667400074070. Its totient is φ = 66667400074068.

The previous prime is 66667400074063. The next prime is 66667400074073. The reversal of 66667400074069 is 96047000476666.

It is a happy number.

66667400074069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40195726800100 + 26471673273969 = 6340010^2 + 5145063^2 .

It is a cyclic number.

It is not a de Polignac number, because 66667400074069 - 2¹⁵ = 66667400041301 is a prime.

It is a super-2 number, since 2×66667400074069² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66667400073998 and 66667400074016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66667400074063) 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, 33333700037034 + 33333700037035.

It is an arithmetic number, because the mean of its divisors is an integer number (33333700037035).

Almost surely, 2^{66667400074069} is an apocalyptic number.

It is an amenable number.

66667400074069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66667400074069 is an equidigital number, since it uses as much as digits as its factorization.

66667400074069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54867456, while the sum is 61.

The spelling of 66667400074069 in words is "sixty-six trillion, six hundred sixty-seven billion, four hundred million, seventy-four thousand, sixty-nine".