66041057 has 2 divisors, whose sum is σ = 66041058. Its totient is φ = 66041056.

The previous prime is 66041023. The next prime is 66041069. The reversal of 66041057 is 75014066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60824401 + 5216656 = 7799^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 66041057 - 2¹⁰ = 66040033 is a prime.

It is a super-2 number, since 2×66041057² = 8722842419354498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66049057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33020528 + 33020529.

It is an arithmetic number, because the mean of its divisors is an integer number (33020529).

Almost surely, 2^66041057 is an apocalyptic number.

It is an amenable number.

66041057 is a deficient number, since it is larger than the sum of its proper divisors (1).

66041057 is an equidigital number, since it uses as much as digits as its factorization.

66041057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 66041057 is about 8126.5648954524. The cubic root of 66041057 is about 404.2077832734.

The spelling of 66041057 in words is "sixty-six million, forty-one thousand, fifty-seven".