66413434141 has 2 divisors, whose sum is σ = 66413434142. Its totient is φ = 66413434140.

The previous prime is 66413434121. The next prime is 66413434189. The reversal of 66413434141 is 14143431466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66401559225 + 11874916 = 257685^2 + 3446^2 .

It is a cyclic number.

It is not a de Polignac number, because 66413434141 - 2¹¹ = 66413432093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66413434141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66413434121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33206717070 + 33206717071.

It is an arithmetic number, because the mean of its divisors is an integer number (33206717071).

Almost surely, 2^66413434141 is an apocalyptic number.

It is an amenable number.

66413434141 is a deficient number, since it is larger than the sum of its proper divisors (1).

66413434141 is an equidigital number, since it uses as much as digits as its factorization.

66413434141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The spelling of 66413434141 in words is "sixty-six billion, four hundred thirteen million, four hundred thirty-four thousand, one hundred forty-one".