66045042113 has 2 divisors, whose sum is σ = 66045042114. Its totient is φ = 66045042112.

The previous prime is 66045042101. The next prime is 66045042251. The reversal of 66045042113 is 31124054066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62912177329 + 3132864784 = 250823^2 + 55972^2 .

It is a cyclic number.

It is not a de Polignac number, because 66045042113 - 2²⁰ = 66043993537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66045042113.

It is not a weakly prime, because it can be changed into another prime (66045047113) 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, 33022521056 + 33022521057.

It is an arithmetic number, because the mean of its divisors is an integer number (33022521057).

Almost surely, 2^66045042113 is an apocalyptic number.

It is an amenable number.

66045042113 is a deficient number, since it is larger than the sum of its proper divisors (1).

66045042113 is an equidigital number, since it uses as much as digits as its factorization.

66045042113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 66045042113 its reverse (31124054066), we get a palindrome (97169096179).

The spelling of 66045042113 in words is "sixty-six billion, forty-five million, forty-two thousand, one hundred thirteen".