66253211 has 2 divisors, whose sum is σ = 66253212. Its totient is φ = 66253210.

The previous prime is 66253193. The next prime is 66253219. The reversal of 66253211 is 11235266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66253211 - 2⁶ = 66253147 is a prime.

It is not a weakly prime, because it can be changed into another prime (66253219) 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, 33126605 + 33126606.

It is an arithmetic number, because the mean of its divisors is an integer number (33126606).

Almost surely, 2^66253211 is an apocalyptic number.

66253211 is a deficient number, since it is larger than the sum of its proper divisors (1).

66253211 is an equidigital number, since it uses as much as digits as its factorization.

66253211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 66253211 is about 8139.6075458219. The cubic root of 66253211 is about 404.6401538732.

Adding to 66253211 its reverse (11235266), we get a palindrome (77488477).

The spelling of 66253211 in words is "sixty-six million, two hundred fifty-three thousand, two hundred eleven".