166081230593 has 2 divisors, whose sum is σ = 166081230594. Its totient is φ = 166081230592.

The previous prime is 166081230589. The next prime is 166081230611. The reversal of 166081230593 is 395032180661.

166081230593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136769051329 + 29312179264 = 369823^2 + 171208^2 .

It is a cyclic number.

It is not a de Polignac number, because 166081230593 - 2² = 166081230589 is a prime.

It is not a weakly prime, because it can be changed into another prime (166081236593) 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, 83040615296 + 83040615297.

It is an arithmetic number, because the mean of its divisors is an integer number (83040615297).

Almost surely, 2^166081230593 is an apocalyptic number.

It is an amenable number.

166081230593 is a deficient number, since it is larger than the sum of its proper divisors (1).

166081230593 is an equidigital number, since it uses as much as digits as its factorization.

166081230593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 166081230593 in words is "one hundred sixty-six billion, eighty-one million, two hundred thirty thousand, five hundred ninety-three".