11661165433 has 2 divisors, whose sum is σ = 11661165434. Its totient is φ = 11661165432.

The previous prime is 11661165377. The next prime is 11661165443. The reversal of 11661165433 is 33456116611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10725294969 + 935870464 = 103563^2 + 30592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11661165433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11661165392 and 11661165401.

It is not a weakly prime, because it can be changed into another prime (11661165443) 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, 5830582716 + 5830582717.

It is an arithmetic number, because the mean of its divisors is an integer number (5830582717).

Almost surely, 2^11661165433 is an apocalyptic number.

It is an amenable number.

11661165433 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661165433 is an equidigital number, since it uses as much as digits as its factorization.

11661165433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The spelling of 11661165433 in words is "eleven billion, six hundred sixty-one million, one hundred sixty-five thousand, four hundred thirty-three".