66141115541 has 2 divisors, whose sum is σ = 66141115542. Its totient is φ = 66141115540.

The previous prime is 66141115493. The next prime is 66141115673. The reversal of 66141115541 is 14551114166.

66141115541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65717373316 + 423742225 = 256354^2 + 20585^2 .

It is a cyclic number.

It is not a de Polignac number, because 66141115541 - 2¹⁰ = 66141114517 is a prime.

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 (66141114541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33070557770 + 33070557771.

It is an arithmetic number, because the mean of its divisors is an integer number (33070557771).

Almost surely, 2^66141115541 is an apocalyptic number.

It is an amenable number.

66141115541 is a deficient number, since it is larger than the sum of its proper divisors (1).

66141115541 is an equidigital number, since it uses as much as digits as its factorization.

66141115541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 35.

The spelling of 66141115541 in words is "sixty-six billion, one hundred forty-one million, one hundred fifteen thousand, five hundred forty-one".