66224243 has 2 divisors, whose sum is σ = 66224244. Its totient is φ = 66224242.

The previous prime is 66224239. The next prime is 66224261. The reversal of 66224243 is 34242266.

66224243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66224243 - 2² = 66224239 is a prime.

It is not a weakly prime, because it can be changed into another prime (66223243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33112121 + 33112122.

It is an arithmetic number, because the mean of its divisors is an integer number (33112122).

Almost surely, 2^66224243 is an apocalyptic number.

66224243 is a deficient number, since it is larger than the sum of its proper divisors (1).

66224243 is an equidigital number, since it uses as much as digits as its factorization.

66224243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

The square root of 66224243 is about 8137.8279042998. The cubic root of 66224243 is about 404.5811714503.

The spelling of 66224243 in words is "sixty-six million, two hundred twenty-four thousand, two hundred forty-three".