66497025111541 has 2 divisors, whose sum is σ = 66497025111542. Its totient is φ = 66497025111540.

The previous prime is 66497025111371. The next prime is 66497025111553. The reversal of 66497025111541 is 14511152079466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40064532419025 + 26432492692516 = 6329655^2 + 5141254^2 .

It is a cyclic number.

It is not a de Polignac number, because 66497025111541 - 2¹⁷ = 66497024980469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66497028111541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33248512555770 + 33248512555771.

It is an arithmetic number, because the mean of its divisors is an integer number (33248512555771).

Almost surely, 2^{66497025111541} is an apocalyptic number.

It is an amenable number.

66497025111541 is a deficient number, since it is larger than the sum of its proper divisors (1).

66497025111541 is an equidigital number, since it uses as much as digits as its factorization.

66497025111541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 66497025111541 in words is "sixty-six trillion, four hundred ninety-seven billion, twenty-five million, one hundred eleven thousand, five hundred forty-one".