166630220 has 24 divisors (see below), whose sum is σ = 350306208. Its totient is φ = 66579200.

The previous prime is 166630187. The next prime is 166630237. The reversal of 166630220 is 22036661.

It is a self number, because there is not a number n which added to its sum of digits gives 166630220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16580 + ... + 24660.

It is an arithmetic number, because the mean of its divisors is an integer number (14596092).

Almost surely, 2^166630220 is an apocalyptic number.

166630220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166630220 is an abundant number, since it is smaller than the sum of its proper divisors (183675988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166630220 is a wasteful number, since it uses less digits than its factorization.

166630220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9121 (or 9119 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 166630220 is about 12908.5328368487. The cubic root of 166630220 is about 550.2810904774.

Adding to 166630220 its reverse (22036661), we get a palindrome (188666881).

The spelling of 166630220 in words is "one hundred sixty-six million, six hundred thirty thousand, two hundred twenty".