222666 has 32 divisors (see below), whose sum is σ = 492480. Its totient is φ = 66816.

The previous prime is 222659. The next prime is 222679. The reversal of 222666 is 666222.

It is a nude number because it is divisible by every one of its digits.

222666 is a modest number, since divided by 666 gives 222 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

222666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3745 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (15390).

2²²²⁶⁶⁶ is an apocalyptic number.

222666 is an abundant number, since it is smaller than the sum of its proper divisors (269814).

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

222666 is a wasteful number, since it uses less digits than its factorization.

222666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118.

The product of its digits is 1728, while the sum is 24.

The square root of 222666 is about 471.8749834437. The cubic root of 222666 is about 60.6109795048.

Adding to 222666 its reverse (666222), we get a palindrome (888888).

Subtracting 222666 from its reverse (666222), we obtain a square (443556 = 666²).

It can be divided in two parts, 222 and 666, that added together give a palindrome (888).

The spelling of 222666 in words is "two hundred twenty-two thousand, six hundred sixty-six".