66444011 has 2 divisors, whose sum is σ = 66444012. Its totient is φ = 66444010.

The previous prime is 66443999. The next prime is 66444019. The reversal of 66444011 is 11044466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66444011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66444019) 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, 33222005 + 33222006.

It is an arithmetic number, because the mean of its divisors is an integer number (33222006).

Almost surely, 2^66444011 is an apocalyptic number.

66444011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66444011 is an equidigital number, since it uses as much as digits as its factorization.

66444011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 66444011 is about 8151.3195864228. The cubic root of 66444011 is about 405.0282173095.

Adding to 66444011 its reverse (11044466), we get a palindrome (77488477).

The spelling of 66444011 in words is "sixty-six million, four hundred forty-four thousand, eleven".