66230009 has 2 divisors, whose sum is σ = 66230010. Its totient is φ = 66230008.

The previous prime is 66229987. The next prime is 66230023. The reversal of 66230009 is 90003266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64722025 + 1507984 = 8045^2 + 1228^2 .

It is a cyclic number.

It is not a de Polignac number, because 66230009 - 2⁸ = 66229753 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66230009.

It is not a weakly prime, because it can be changed into another prime (66230039) 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, 33115004 + 33115005.

It is an arithmetic number, because the mean of its divisors is an integer number (33115005).

Almost surely, 2^66230009 is an apocalyptic number.

It is an amenable number.

66230009 is a deficient number, since it is larger than the sum of its proper divisors (1).

66230009 is an equidigital number, since it uses as much as digits as its factorization.

66230009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 66230009 is about 8138.1821680275. The cubic root of 66230009 is about 404.5929131087.

The spelling of 66230009 in words is "sixty-six million, two hundred thirty thousand, nine".