166555043 has 2 divisors, whose sum is σ = 166555044. Its totient is φ = 166555042.

The previous prime is 166555027. The next prime is 166555057. The reversal of 166555043 is 340555661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166555043 - 2⁴ = 166555027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166554994 and 166555012.

It is not a weakly prime, because it can be changed into another prime (166555943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83277521 + 83277522.

It is an arithmetic number, because the mean of its divisors is an integer number (83277522).

Almost surely, 2^166555043 is an apocalyptic number.

166555043 is a deficient number, since it is larger than the sum of its proper divisors (1).

166555043 is an equidigital number, since it uses as much as digits as its factorization.

166555043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 166555043 is about 12905.6205972437. The cubic root of 166555043 is about 550.1983229690.

The spelling of 166555043 in words is "one hundred sixty-six million, five hundred fifty-five thousand, forty-three".