2220166656 has 60 divisors (see below), whose sum is σ = 6407564592. Its totient is φ = 740054016.

The previous prime is 2220166651. The next prime is 2220166657. The reversal of 2220166656 is 6566610222.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2220166656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220166651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236296 + ... + 245511.

Almost surely, 2^2220166656 is an apocalyptic number.

It is an amenable number.

2220166656 is an abundant number, since it is smaller than the sum of its proper divisors (4187397936).

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

2220166656 is an equidigital number, since it uses as much as digits as its factorization.

2220166656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481831 (or 481812 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2220166656 is about 47118.6444626753. The cubic root of 2220166656 is about 1304.5533927787.

Adding to 2220166656 its reverse (6566610222), we get a palindrome (8786776878).

The spelling of 2220166656 in words is "two billion, two hundred twenty million, one hundred sixty-six thousand, six hundred fifty-six".