66075565526149 has 2 divisors, whose sum is σ = 66075565526150. Its totient is φ = 66075565526148.

The previous prime is 66075565526077. The next prime is 66075565526167. The reversal of 66075565526149 is 94162556557066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65914669876225 + 160895649924 = 8118785^2 + 401118^2 .

It is a cyclic number.

It is not a de Polignac number, because 66075565526149 - 2⁷ = 66075565526021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66075565526249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33037782763074 + 33037782763075.

It is an arithmetic number, because the mean of its divisors is an integer number (33037782763075).

Almost surely, 2^{66075565526149} is an apocalyptic number.

It is an amenable number.

66075565526149 is a deficient number, since it is larger than the sum of its proper divisors (1).

66075565526149 is an equidigital number, since it uses as much as digits as its factorization.

66075565526149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240000, while the sum is 67.

The spelling of 66075565526149 in words is "sixty-six trillion, seventy-five billion, five hundred sixty-five million, five hundred twenty-six thousand, one hundred forty-nine".