2220244661 has 2 divisors, whose sum is σ = 2220244662. Its totient is φ = 2220244660.

The previous prime is 2220244627. The next prime is 2220244673. The reversal of 2220244661 is 1664420222.

2220244661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2080272100 + 139972561 = 45610^2 + 11831^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220244661 - 2⁶ = 2220244597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220244261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110122330 + 1110122331.

It is an arithmetic number, because the mean of its divisors is an integer number (1110122331).

Almost surely, 2^2220244661 is an apocalyptic number.

It is an amenable number.

2220244661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220244661 is an equidigital number, since it uses as much as digits as its factorization.

2220244661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 2220244661 is about 47119.4722062970. The cubic root of 2220244661 is about 1304.5686709855.

Adding to 2220244661 its reverse (1664420222), we get a palindrome (3884664883).

The spelling of 2220244661 in words is "two billion, two hundred twenty million, two hundred forty-four thousand, six hundred sixty-one".