166158425233 has 2 divisors, whose sum is σ = 166158425234. Its totient is φ = 166158425232.

The previous prime is 166158425183. The next prime is 166158425243. The reversal of 166158425233 is 332524851661.

It is a happy number.

166158425233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166013872704 + 144552529 = 407448^2 + 12023^2 .

It is a cyclic number.

It is not a de Polignac number, because 166158425233 - 2¹³ = 166158417041 is a prime.

It is a super-2 number, since 2×166158425233² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166158425243) 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, 83079212616 + 83079212617.

It is an arithmetic number, because the mean of its divisors is an integer number (83079212617).

Almost surely, 2^166158425233 is an apocalyptic number.

It is an amenable number.

166158425233 is a deficient number, since it is larger than the sum of its proper divisors (1).

166158425233 is an equidigital number, since it uses as much as digits as its factorization.

166158425233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 46.

The spelling of 166158425233 in words is "one hundred sixty-six billion, one hundred fifty-eight million, four hundred twenty-five thousand, two hundred thirty-three".