222660 has 36 divisors (see below), whose sum is σ = 675948. Its totient is φ = 59328.

The previous prime is 222659. The next prime is 222679. The reversal of 222660 is 66222.

222660 is a `hidden beast` number, since 2 + 2 + 2 + 660 = 666.

222660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 125316 + 97344 = 354^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 222660.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439 + ... + 798.

2²²²⁶⁶⁰ is an apocalyptic number.

222660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222660 is an abundant number, since it is smaller than the sum of its proper divisors (453288).

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

222660 is a wasteful number, since it uses less digits than its factorization.

222660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 222660 is about 471.8686257848. The cubic root of 222660 is about 60.6104350883.

Adding to 222660 its reverse (66222), we get a palindrome (288882).

The spelling of 222660 in words is "two hundred twenty-two thousand, six hundred sixty".