166158425249 has 2 divisors, whose sum is σ = 166158425250. Its totient is φ = 166158425248.

The previous prime is 166158425243. The next prime is 166158425369. The reversal of 166158425249 is 942524851661.

166158425249 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., 159525951649 + 6632473600 = 399407^2 + 81440^2 .

It is a cyclic number.

It is not a de Polignac number, because 166158425249 - 2⁴ = 166158425233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166158425249.

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, 83079212624 + 83079212625.

It is an arithmetic number, because the mean of its divisors is an integer number (83079212625).

Almost surely, 2^166158425249 is an apocalyptic number.

It is an amenable number.

166158425249 is a deficient number, since it is larger than the sum of its proper divisors (1).

166158425249 is an equidigital number, since it uses as much as digits as its factorization.

166158425249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 53.

The spelling of 166158425249 in words is "one hundred sixty-six billion, one hundred fifty-eight million, four hundred twenty-five thousand, two hundred forty-nine".