2444446661 has 2 divisors, whose sum is σ = 2444446662. Its totient is φ = 2444446660.

The previous prime is 2444446651. The next prime is 2444446663. The reversal of 2444446661 is 1666444442.

It is a happy number.

2444446661 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., 1943134561 + 501312100 = 44081^2 + 22390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2444446661 - 2³⁰ = 1370704837 is a prime.

Together with 2444446663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2444446663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222223330 + 1222223331.

It is an arithmetic number, because the mean of its divisors is an integer number (1222223331).

Almost surely, 2^2444446661 is an apocalyptic number.

It is an amenable number.

2444446661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2444446661 is an equidigital number, since it uses as much as digits as its factorization.

2444446661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 41.

The square root of 2444446661 is about 49441.3456633211. The cubic root of 2444446661 is about 1347.0804140391.

The spelling of 2444446661 in words is "two billion, four hundred forty-four million, four hundred forty-six thousand, six hundred sixty-one".