168566366140633 has 2 divisors, whose sum is σ = 168566366140634. Its totient is φ = 168566366140632.

The previous prime is 168566366140607. The next prime is 168566366140643. The reversal of 168566366140633 is 336041663665861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132409138844889 + 36157227295744 = 11506917^2 + 6013088^2 .

It is a cyclic number.

It is not a de Polignac number, because 168566366140633 - 2³³ = 168557776206041 is a prime.

It is not a weakly prime, because it can be changed into another prime (168566366140643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84283183070316 + 84283183070317.

It is an arithmetic number, because the mean of its divisors is an integer number (84283183070317).

Almost surely, 2^{168566366140633} is an apocalyptic number.

It is an amenable number.

168566366140633 is a deficient number, since it is larger than the sum of its proper divisors (1).

168566366140633 is an equidigital number, since it uses as much as digits as its factorization.

168566366140633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201553920, while the sum is 64.

The spelling of 168566366140633 in words is "one hundred sixty-eight trillion, five hundred sixty-six billion, three hundred sixty-six million, one hundred forty thousand, six hundred thirty-three".