166223 has 4 divisors (see below), whose sum is σ = 167808. Its totient is φ = 164640.

The previous prime is 166219. The next prime is 166237. The reversal of 166223 is 322661.

166223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322661 = 229 ⋅1409.

It is a cyclic number.

It is not a de Polignac number, because 166223 - 2² = 166219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166195 and 166204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623 + ... + 848.

It is an arithmetic number, because the mean of its divisors is an integer number (41952).

2¹⁶⁶²²³ is an apocalyptic number.

166223 is a deficient number, since it is larger than the sum of its proper divisors (1585).

166223 is a wasteful number, since it uses less digits than its factorization.

166223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584.

The product of its digits is 432, while the sum is 20.

The square root of 166223 is about 407.7045498888. The cubic root of 166223 is about 54.9832455854.

Adding to 166223 its reverse (322661), we get a palindrome (488884).

It can be divided in two parts, 1662 and 23, that multiplied together give a triangular number (38226 = T₂₇₆).

The spelling of 166223 in words is "one hundred sixty-six thousand, two hundred twenty-three".