4402645665 has 16 divisors (see below), whose sum is σ = 7684618176. Its totient is φ = 2134616000.

The previous prime is 4402645619. The next prime is 4402645673. The reversal of 4402645665 is 5665462044.

It is not a de Polignac number, because 4402645665 - 2⁹ = 4402645153 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13341186 + ... + 13341515.

It is an arithmetic number, because the mean of its divisors is an integer number (480288636).

Almost surely, 2^4402645665 is an apocalyptic number.

It is an amenable number.

4402645665 is a deficient number, since it is larger than the sum of its proper divisors (3281972511).

4402645665 is a wasteful number, since it uses less digits than its factorization.

4402645665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26682720.

The product of its (nonzero) digits is 691200, while the sum is 42.

The square root of 4402645665 is about 66352.4352605087. The cubic root of 4402645665 is about 1638.9709071550.

The spelling of 4402645665 in words is "four billion, four hundred two million, six hundred forty-five thousand, six hundred sixty-five".