3220006656 has 144 divisors (see below), whose sum is σ = 8785929600. Its totient is φ = 1046605824.

The previous prime is 3220006649. The next prime is 3220006661. The reversal of 3220006656 is 6566000223.

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, 8110650 + ... + 8111046.

It is an arithmetic number, because the mean of its divisors is an integer number (61013400).

Almost surely, 2^3220006656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3220006656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4392964800).

3220006656 is an abundant number, since it is smaller than the sum of its proper divisors (5565922944).

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

3220006656 is a wasteful number, since it uses less digits than its factorization.

3220006656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 3220006656 is about 56745.1024847079. The cubic root of 3220006656 is about 1476.6772694018.

Adding to 3220006656 its reverse (6566000223), we get a palindrome (9786006879).

The spelling of 3220006656 in words is "three billion, two hundred twenty million, six thousand, six hundred fifty-six".