2220633666 has 24 divisors (see below), whose sum is σ = 4817046780. Its totient is φ = 739338336.

The previous prime is 2220633661. The next prime is 2220633703. The reversal of 2220633666 is 6663360222.

It can be written as a sum of positive squares in 2 ways, for example, as 2220388641 + 245025 = 47121^2 + 495^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2220633666.

It is not an unprimeable number, because it can be changed into a prime (2220633661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56961 + ... + 87668.

Almost surely, 2^2220633666 is an apocalyptic number.

2220633666 is an abundant number, since it is smaller than the sum of its proper divisors (2596413114).

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

2220633666 is a wasteful number, since it uses less digits than its factorization.

2220633666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145490 (or 145487 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 2220633666 is about 47123.5998837101. The cubic root of 2220633666 is about 1304.6448568986.

Adding to 2220633666 its reverse (6663360222), we get a palindrome (8883993888).

The spelling of 2220633666 in words is "two billion, two hundred twenty million, six hundred thirty-three thousand, six hundred sixty-six".