222006660 has 48 divisors (see below), whose sum is σ = 638425536. Its totient is φ = 57601152.

The previous prime is 222006647. The next prime is 222006667. The reversal of 222006660 is 66600222.

222006660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

222006660 is a modest number, since divided by 6660 gives 2220 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 222006660.

It is not an unprimeable number, because it can be changed into a prime (222006667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47782 + ... + 52221.

It is an arithmetic number, because the mean of its divisors is an integer number (13300532).

Almost surely, 2^222006660 is an apocalyptic number.

222006660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222006660 is an abundant number, since it is smaller than the sum of its proper divisors (416418876).

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

222006660 is a wasteful number, since it uses less digits than its factorization.

222006660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100052 (or 100050 counting only the distinct ones).

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

The square root of 222006660 is about 14899.8879190415. The cubic root of 222006660 is about 605.5109496395.

Adding to 222006660 its reverse (66600222), we get a palindrome (288606882).

The spelling of 222006660 in words is "two hundred twenty-two million, six thousand, six hundred sixty".