220966 has 16 divisors (see below), whose sum is σ = 359856. Its totient is φ = 101376.

The previous prime is 220939. The next prime is 220973. The reversal of 220966 is 669022.

It is a self number, because there is not a number n which added to its sum of digits gives 220966.

It is a congruent number.

It is an unprimeable number.

220966 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 7 ways as a sum of consecutive naturals, for example, 2230 + ... + 2326.

It is an arithmetic number, because the mean of its divisors is an integer number (22491).

2²²⁰⁹⁶⁶ is an apocalyptic number.

220966 is a deficient number, since it is larger than the sum of its proper divisors (138890).

220966 is a wasteful number, since it uses less digits than its factorization.

220966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 220966 is about 470.0702075222. The cubic root of 220966 is about 60.4563353172.

Adding to 220966 its reverse (669022), we get a palindrome (889988).

The spelling of 220966 in words is "two hundred twenty thousand, nine hundred sixty-six".