66740074069 has 2 divisors, whose sum is σ = 66740074070. Its totient is φ = 66740074068.

The previous prime is 66740074043. The next prime is 66740074081. The reversal of 66740074069 is 96047004766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62835448900 + 3904625169 = 250670^2 + 62487^2 .

It is a cyclic number.

It is not a de Polignac number, because 66740074069 - 2¹⁵ = 66740041301 is a prime.

It is a super-2 number, since 2×66740074069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66740074039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33370037034 + 33370037035.

It is an arithmetic number, because the mean of its divisors is an integer number (33370037035).

Almost surely, 2^66740074069 is an apocalyptic number.

It is an amenable number.

66740074069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66740074069 is an equidigital number, since it uses as much as digits as its factorization.

66740074069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 66740074069 in words is "sixty-six billion, seven hundred forty million, seventy-four thousand, sixty-nine".