66244511 has 2 divisors, whose sum is σ = 66244512. Its totient is φ = 66244510.

The previous prime is 66244487. The next prime is 66244517. The reversal of 66244511 is 11544266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66244511 - 2⁶ = 66244447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66244517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33122255 + 33122256.

It is an arithmetic number, because the mean of its divisors is an integer number (33122256).

Almost surely, 2^66244511 is an apocalyptic number.

66244511 is a deficient number, since it is larger than the sum of its proper divisors (1).

66244511 is an equidigital number, since it uses as much as digits as its factorization.

66244511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 66244511 is about 8139.0731044757. The cubic root of 66244511 is about 404.6224414062.

Adding to 66244511 its reverse (11544266), we get a palindrome (77788777).

The spelling of 66244511 in words is "sixty-six million, two hundred forty-four thousand, five hundred eleven".