66052309 has 2 divisors, whose sum is σ = 66052310. Its totient is φ = 66052308.

The previous prime is 66052291. The next prime is 66052321. The reversal of 66052309 is 90325066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62758084 + 3294225 = 7922^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 66052309 - 2¹⁷ = 65921237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66052369) 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, 33026154 + 33026155.

It is an arithmetic number, because the mean of its divisors is an integer number (33026155).

Almost surely, 2^66052309 is an apocalyptic number.

It is an amenable number.

66052309 is a deficient number, since it is larger than the sum of its proper divisors (1).

66052309 is an equidigital number, since it uses as much as digits as its factorization.

66052309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 66052309 is about 8127.2571633977. The cubic root of 66052309 is about 404.2307381236.

The spelling of 66052309 in words is "sixty-six million, fifty-two thousand, three hundred nine".