220710660 has 96 divisors (see below), whose sum is σ = 659135232. Its totient is φ = 54988800.

The previous prime is 220710653. The next prime is 220710697. The reversal of 220710660 is 66017022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 220710660.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153304 + ... + 154736.

It is an arithmetic number, because the mean of its divisors is an integer number (6865992).

Almost surely, 2^220710660 is an apocalyptic number.

220710660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220710660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329567616).

220710660 is an abundant number, since it is smaller than the sum of its proper divisors (438424572).

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

220710660 is a wasteful number, since it uses less digits than its factorization.

220710660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613 (or 1611 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 220710660 is about 14856.3340027074. The cubic root of 220710660 is about 604.3303931906.

Adding to 220710660 its reverse (66017022), we get a palindrome (286727682).

The spelling of 220710660 in words is "two hundred twenty million, seven hundred ten thousand, six hundred sixty".