66513323141 has 2 divisors, whose sum is σ = 66513323142. Its totient is φ = 66513323140.

The previous prime is 66513323131. The next prime is 66513323231. The reversal of 66513323141 is 14132331566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56669706916 + 9843616225 = 238054^2 + 99215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66513323141 is a prime.

It is a super-2 number, since 2×66513323141² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66513323131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33256661570 + 33256661571.

It is an arithmetic number, because the mean of its divisors is an integer number (33256661571).

Almost surely, 2^66513323141 is an apocalyptic number.

It is an amenable number.

66513323141 is a deficient number, since it is larger than the sum of its proper divisors (1).

66513323141 is an equidigital number, since it uses as much as digits as its factorization.

66513323141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The spelling of 66513323141 in words is "sixty-six billion, five hundred thirteen million, three hundred twenty-three thousand, one hundred forty-one".