66434242141 has 2 divisors, whose sum is σ = 66434242142. Its totient is φ = 66434242140.

The previous prime is 66434242117. The next prime is 66434242223. The reversal of 66434242141 is 14124243466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49097253241 + 17336988900 = 221579^2 + 131670^2 .

It is a cyclic number.

It is not a de Polignac number, because 66434242141 - 2¹⁷ = 66434111069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66434242141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66434242841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33217121070 + 33217121071.

It is an arithmetic number, because the mean of its divisors is an integer number (33217121071).

Almost surely, 2^66434242141 is an apocalyptic number.

It is an amenable number.

66434242141 is a deficient number, since it is larger than the sum of its proper divisors (1).

66434242141 is an equidigital number, since it uses as much as digits as its factorization.

66434242141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 37.

The spelling of 66434242141 in words is "sixty-six billion, four hundred thirty-four million, two hundred forty-two thousand, one hundred forty-one".