166000543 has 2 divisors, whose sum is σ = 166000544. Its totient is φ = 166000542.

The previous prime is 166000501. The next prime is 166000547. The reversal of 166000543 is 345000661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166000543 - 2¹⁷ = 165869471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166000547) 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, 83000271 + 83000272.

It is an arithmetic number, because the mean of its divisors is an integer number (83000272).

Almost surely, 2^166000543 is an apocalyptic number.

166000543 is a deficient number, since it is larger than the sum of its proper divisors (1).

166000543 is an equidigital number, since it uses as much as digits as its factorization.

166000543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 166000543 is about 12884.1197991947. The cubic root of 166000543 is about 549.5870652567.

The spelling of 166000543 in words is "one hundred sixty-six million, five hundred forty-three", and thus it is an aban number.