11966818639 has 2 divisors, whose sum is σ = 11966818640. Its totient is φ = 11966818638.

The previous prime is 11966818559. The next prime is 11966818673. The reversal of 11966818639 is 93681866911.

11966818639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (93681866911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11966818639 - 2¹³ = 11966810447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11966818139) 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, 5983409319 + 5983409320.

It is an arithmetic number, because the mean of its divisors is an integer number (5983409320).

Almost surely, 2^11966818639 is an apocalyptic number.

11966818639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11966818639 is an equidigital number, since it uses as much as digits as its factorization.

11966818639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 58.

The spelling of 11966818639 in words is "eleven billion, nine hundred sixty-six million, eight hundred eighteen thousand, six hundred thirty-nine".