166236223 has 2 divisors, whose sum is σ = 166236224. Its totient is φ = 166236222.

The previous prime is 166236209. The next prime is 166236241. The reversal of 166236223 is 322632661.

It is a happy number.

166236223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166236223 - 2²¹ = 164139071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166236253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83118111 + 83118112.

It is an arithmetic number, because the mean of its divisors is an integer number (83118112).

Almost surely, 2^166236223 is an apocalyptic number.

166236223 is a deficient number, since it is larger than the sum of its proper divisors (1).

166236223 is an equidigital number, since it uses as much as digits as its factorization.

166236223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 166236223 is about 12893.2626980140. The cubic root of 166236223 is about 549.8470351476.

Adding to 166236223 its reverse (322632661), we get a palindrome (488868884).

The spelling of 166236223 in words is "one hundred sixty-six million, two hundred thirty-six thousand, two hundred twenty-three".