166535143 has 2 divisors, whose sum is σ = 166535144. Its totient is φ = 166535142.

The previous prime is 166535123. The next prime is 166535167. The reversal of 166535143 is 341535661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166535143 - 2⁹ = 166534631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166535099 and 166535108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166535123) 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, 83267571 + 83267572.

It is an arithmetic number, because the mean of its divisors is an integer number (83267572).

Almost surely, 2^166535143 is an apocalyptic number.

166535143 is a deficient number, since it is larger than the sum of its proper divisors (1).

166535143 is an equidigital number, since it uses as much as digits as its factorization.

166535143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 166535143 is about 12904.8495923044. The cubic root of 166535143 is about 550.1764095273.

The spelling of 166535143 in words is "one hundred sixty-six million, five hundred thirty-five thousand, one hundred forty-three".