66223411 has 2 divisors, whose sum is σ = 66223412. Its totient is φ = 66223410.

The previous prime is 66223393. The next prime is 66223427. The reversal of 66223411 is 11432266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66223411 - 2¹⁵ = 66190643 is a prime.

It is not a weakly prime, because it can be changed into another prime (66223441) 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, 33111705 + 33111706.

It is an arithmetic number, because the mean of its divisors is an integer number (33111706).

Almost surely, 2^66223411 is an apocalyptic number.

66223411 is a deficient number, since it is larger than the sum of its proper divisors (1).

66223411 is an equidigital number, since it uses as much as digits as its factorization.

66223411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 66223411 is about 8137.7767848473. The cubic root of 66223411 is about 404.5794771415.

Adding to 66223411 its reverse (11432266), we get a palindrome (77655677).

The spelling of 66223411 in words is "sixty-six million, two hundred twenty-three thousand, four hundred eleven".