166071043 has 2 divisors, whose sum is σ = 166071044. Its totient is φ = 166071042.

The previous prime is 166071019. The next prime is 166071049. The reversal of 166071043 is 340170661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166071043 - 2¹⁷ = 165939971 is a prime.

It is not a weakly prime, because it can be changed into another prime (166071049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83035521 + 83035522.

It is an arithmetic number, because the mean of its divisors is an integer number (83035522).

Almost surely, 2^166071043 is an apocalyptic number.

166071043 is a deficient number, since it is larger than the sum of its proper divisors (1).

166071043 is an equidigital number, since it uses as much as digits as its factorization.

166071043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 166071043 is about 12886.8554348995. The cubic root of 166071043 is about 549.6648569788.

It can be divided in two parts, 1660710 and 43, that added together give a triangular number (1660753 = T₁₈₂₂).

The spelling of 166071043 in words is "one hundred sixty-six million, seventy-one thousand, forty-three".