66911018033 has 2 divisors, whose sum is σ = 66911018034. Its totient is φ = 66911018032.

The previous prime is 66911018021. The next prime is 66911018117. The reversal of 66911018033 is 33081011966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44862628864 + 22048389169 = 211808^2 + 148487^2 .

It is a cyclic number.

It is not a de Polignac number, because 66911018033 - 2⁸ = 66911017777 is a prime.

It is not a weakly prime, because it can be changed into another prime (66911014033) 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, 33455509016 + 33455509017.

It is an arithmetic number, because the mean of its divisors is an integer number (33455509017).

Almost surely, 2^66911018033 is an apocalyptic number.

It is an amenable number.

66911018033 is a deficient number, since it is larger than the sum of its proper divisors (1).

66911018033 is an equidigital number, since it uses as much as digits as its factorization.

66911018033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

Adding to 66911018033 its reverse (33081011966), we get a palindrome (99992029999).

The spelling of 66911018033 in words is "sixty-six billion, nine hundred eleven million, eighteen thousand, thirty-three".