66365149 has 2 divisors, whose sum is σ = 66365150. Its totient is φ = 66365148.

The previous prime is 66365113. The next prime is 66365207. The reversal of 66365149 is 94156366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51581124 + 14784025 = 7182^2 + 3845^2 .

It is a cyclic number.

It is not a de Polignac number, because 66365149 - 2¹⁹ = 65840861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66365449) 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, 33182574 + 33182575.

It is an arithmetic number, because the mean of its divisors is an integer number (33182575).

Almost surely, 2^66365149 is an apocalyptic number.

It is an amenable number.

66365149 is a deficient number, since it is larger than the sum of its proper divisors (1).

66365149 is an equidigital number, since it uses as much as digits as its factorization.

66365149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The square root of 66365149 is about 8146.4807739293. The cubic root of 66365149 is about 404.8679120132.

The spelling of 66365149 in words is "sixty-six million, three hundred sixty-five thousand, one hundred forty-nine".