166857443 has 2 divisors, whose sum is σ = 166857444. Its totient is φ = 166857442.

The previous prime is 166857421. The next prime is 166857491. The reversal of 166857443 is 344758661.

166857443 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 is a cyclic number.

It is not a de Polignac number, because 166857443 - 2¹⁰ = 166856419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166857394 and 166857403.

It is not a weakly prime, because it can be changed into another prime (166857343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83428721 + 83428722.

It is an arithmetic number, because the mean of its divisors is an integer number (83428722).

Almost surely, 2^166857443 is an apocalyptic number.

166857443 is a deficient number, since it is larger than the sum of its proper divisors (1).

166857443 is an equidigital number, since it uses as much as digits as its factorization.

166857443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 166857443 is about 12917.3311097920. The cubic root of 166857443 is about 550.5311046074.

The spelling of 166857443 in words is "one hundred sixty-six million, eight hundred fifty-seven thousand, four hundred forty-three".