1166465966489 has 2 divisors, whose sum is σ = 1166465966490. Its totient is φ = 1166465966488.

The previous prime is 1166465966461. The next prime is 1166465966551. The reversal of 1166465966489 is 9846695646611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800876436889 + 365589529600 = 894917^2 + 604640^2 .

It is an emirp because it is prime and its reverse (9846695646611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1166465966489 - 2⁸ = 1166465966233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1166465966189) 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, 583232983244 + 583232983245.

It is an arithmetic number, because the mean of its divisors is an integer number (583232983245).

Almost surely, 2^{1166465966489} is an apocalyptic number.

It is an amenable number.

1166465966489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166465966489 is an equidigital number, since it uses as much as digits as its factorization.

1166465966489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403107840, while the sum is 71.

The spelling of 1166465966489 in words is "one trillion, one hundred sixty-six billion, four hundred sixty-five million, nine hundred sixty-six thousand, four hundred eighty-nine".