166655443 has 2 divisors, whose sum is σ = 166655444. Its totient is φ = 166655442.

The previous prime is 166655429. The next prime is 166655491. The reversal of 166655443 is 344556661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166655443 - 2⁹ = 166654931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166655396 and 166655405.

It is not a weakly prime, because it can be changed into another prime (166655243) 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, 83327721 + 83327722.

It is an arithmetic number, because the mean of its divisors is an integer number (83327722).

Almost surely, 2^166655443 is an apocalyptic number.

166655443 is a deficient number, since it is larger than the sum of its proper divisors (1).

166655443 is an equidigital number, since it uses as much as digits as its factorization.

166655443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 40.

The square root of 166655443 is about 12909.5097892987. The cubic root of 166655443 is about 550.3088546282.

The spelling of 166655443 in words is "one hundred sixty-six million, six hundred fifty-five thousand, four hundred forty-three".