166044223 has 4 divisors (see below), whose sum is σ = 166076208. Its totient is φ = 166012240.

The previous prime is 166044217. The next prime is 166044251. The reversal of 166044223 is 322440661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166044223 - 2⁵ = 166044191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166044191 and 166044200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166041223) 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, 6211 + ... + 19252.

It is an arithmetic number, because the mean of its divisors is an integer number (41519052).

Almost surely, 2^166044223 is an apocalyptic number.

166044223 is a deficient number, since it is larger than the sum of its proper divisors (31985).

166044223 is an equidigital number, since it uses as much as digits as its factorization.

166044223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31984.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 166044223 is about 12885.8147976758. The cubic root of 166044223 is about 549.6352656166.

Adding to 166044223 its reverse (322440661), we get a palindrome (488484884).

The spelling of 166044223 in words is "one hundred sixty-six million, forty-four thousand, two hundred twenty-three".