1166165065573 has 2 divisors, whose sum is σ = 1166165065574. Its totient is φ = 1166165065572.

The previous prime is 1166165065487. The next prime is 1166165065577. The reversal of 1166165065573 is 3755605616611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 909852715044 + 256312350529 = 953862^2 + 506273^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166165065573 - 2³⁷ = 1028726112101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1166165065573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166165065577) 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, 583082532786 + 583082532787.

It is an arithmetic number, because the mean of its divisors is an integer number (583082532787).

Almost surely, 2^{1166165065573} is an apocalyptic number.

It is an amenable number.

1166165065573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166165065573 is an equidigital number, since it uses as much as digits as its factorization.

1166165065573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 1166165065573 in words is "one trillion, one hundred sixty-six billion, one hundred sixty-five million, sixty-five thousand, five hundred seventy-three".