166120233 has 16 divisors (see below), whose sum is σ = 227463936. Its totient is φ = 107775360.

The previous prime is 166120217. The next prime is 166120259. The reversal of 166120233 is 332021661.

It is a happy number.

It is not a de Polignac number, because 166120233 - 2⁴ = 166120217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166120133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55491 + ... + 58407.

It is an arithmetic number, because the mean of its divisors is an integer number (14216496).

Almost surely, 2^166120233 is an apocalyptic number.

It is an amenable number.

166120233 is a deficient number, since it is larger than the sum of its proper divisors (61343703).

166120233 is a wasteful number, since it uses less digits than its factorization.

166120233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 166120233 is about 12888.7638274584. The cubic root of 166120233 is about 549.7191215970.

Adding to 166120233 its reverse (332021661), we get a palindrome (498141894).

The spelling of 166120233 in words is "one hundred sixty-six million, one hundred twenty thousand, two hundred thirty-three".