166220224 has 14 divisors (see below), whose sum is σ = 329843384. Its totient is φ = 83110080.

The previous prime is 166220213. The next prime is 166220251. The reversal of 166220224 is 422022661.

It is a super-2 number, since 2×166220224² = 55258325733220352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298532 + ... + 1298659.

Almost surely, 2^166220224 is an apocalyptic number.

It is an amenable number.

166220224 is a deficient number, since it is larger than the sum of its proper divisors (163623160).

166220224 is an equidigital number, since it uses as much as digits as its factorization.

166220224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597203 (or 2597193 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 166220224 is about 12892.6422427678. The cubic root of 166220224 is about 549.8293950192.

Adding to 166220224 its reverse (422022661), we get a palindrome (588242885).

The spelling of 166220224 in words is "one hundred sixty-six million, two hundred twenty thousand, two hundred twenty-four".