166655243 has 2 divisors, whose sum is σ = 166655244. Its totient is φ = 166655242.

The previous prime is 166655239. The next prime is 166655249. The reversal of 166655243 is 342556661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166655243 - 2² = 166655239 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 166655197 and 166655206.

It is not a weakly prime, because it can be changed into another prime (166655249) 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, 83327621 + 83327622.

It is an arithmetic number, because the mean of its divisors is an integer number (83327622).

Almost surely, 2^166655243 is an apocalyptic number.

166655243 is a deficient number, since it is larger than the sum of its proper divisors (1).

166655243 is an equidigital number, since it uses as much as digits as its factorization.

166655243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

The square root of 166655243 is about 12909.5020430689. The cubic root of 166655243 is about 550.3086344897.

The spelling of 166655243 in words is "one hundred sixty-six million, six hundred fifty-five thousand, two hundred forty-three".