166266223 has 2 divisors, whose sum is σ = 166266224. Its totient is φ = 166266222.

The previous prime is 166266173. The next prime is 166266257. The reversal of 166266223 is 322662661.

It is an a-pointer prime, because the next prime (166266257) can be obtained adding 166266223 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166266223 - 2⁹ = 166265711 is a prime.

It is equal to p_9305773 and since 166266223 and 9305773 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166266293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83133111 + 83133112.

It is an arithmetic number, because the mean of its divisors is an integer number (83133112).

Almost surely, 2^166266223 is an apocalyptic number.

166266223 is a deficient number, since it is larger than the sum of its proper divisors (1).

166266223 is an equidigital number, since it uses as much as digits as its factorization.

166266223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 166266223 is about 12894.4260438377. The cubic root of 166266223 is about 549.8801094050.

The spelling of 166266223 in words is "one hundred sixty-six million, two hundred sixty-six thousand, two hundred twenty-three".