66230393 has 2 divisors, whose sum is σ = 66230394. Its totient is φ = 66230392.

The previous prime is 66230389. The next prime is 66230399. The reversal of 66230393 is 39303266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65723449 + 506944 = 8107^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 66230393 - 2² = 66230389 is a prime.

It is not a weakly prime, because it can be changed into another prime (66230399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33115196 + 33115197.

It is an arithmetic number, because the mean of its divisors is an integer number (33115197).

Almost surely, 2^66230393 is an apocalyptic number.

It is an amenable number.

66230393 is a deficient number, since it is larger than the sum of its proper divisors (1).

66230393 is an equidigital number, since it uses as much as digits as its factorization.

66230393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 32.

The square root of 66230393 is about 8138.2057604855. The cubic root of 66230393 is about 404.5936950472.

The spelling of 66230393 in words is "sixty-six million, two hundred thirty thousand, three hundred ninety-three".