66804199211 has 2 divisors, whose sum is σ = 66804199212. Its totient is φ = 66804199210.

The previous prime is 66804199199. The next prime is 66804199237. The reversal of 66804199211 is 11299140866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66804199211 - 2¹⁴ = 66804182827 is a prime.

It is not a weakly prime, because it can be changed into another prime (66804199261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33402099605 + 33402099606.

It is an arithmetic number, because the mean of its divisors is an integer number (33402099606).

Almost surely, 2^66804199211 is an apocalyptic number.

66804199211 is a deficient number, since it is larger than the sum of its proper divisors (1).

66804199211 is an equidigital number, since it uses as much as digits as its factorization.

66804199211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 66804199211 in words is "sixty-six billion, eight hundred four million, one hundred ninety-nine thousand, two hundred eleven".