4444665647 has 2 divisors, whose sum is σ = 4444665648. Its totient is φ = 4444665646.

The previous prime is 4444665629. The next prime is 4444665739. The reversal of 4444665647 is 7465664444.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4444665647 - 2⁶ = 4444665583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4444665595 and 4444665604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4444635647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222332823 + 2222332824.

It is an arithmetic number, because the mean of its divisors is an integer number (2222332824).

Almost surely, 2^4444665647 is an apocalyptic number.

4444665647 is a deficient number, since it is larger than the sum of its proper divisors (1).

4444665647 is an equidigital number, since it uses as much as digits as its factorization.

4444665647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 50.

The square root of 4444665647 is about 66668.3256651913. The cubic root of 4444665647 is about 1644.1686590551.

The spelling of 4444665647 in words is "four billion, four hundred forty-four million, six hundred sixty-five thousand, six hundred forty-seven".