225556660 has 48 divisors (see below), whose sum is σ = 543344256. Its totient is φ = 77046912.

The previous prime is 225556649. The next prime is 225556673. The reversal of 225556660 is 66655522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36774 + ... + 42466.

It is an arithmetic number, because the mean of its divisors is an integer number (11319672).

Almost surely, 2^225556660 is an apocalyptic number.

225556660 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 225556660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271672128).

225556660 is an abundant number, since it is smaller than the sum of its proper divisors (317787596).

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

225556660 is a wasteful number, since it uses less digits than its factorization.

225556660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5992 (or 5990 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 225556660 is about 15018.5438708285. The cubic root of 225556660 is about 608.7213744099.

The spelling of 225556660 in words is "two hundred twenty-five million, five hundred fifty-six thousand, six hundred sixty".