4444666665 has 8 divisors (see below), whose sum is σ = 7111466688. Its totient is φ = 2370488880.

The previous prime is 4444666661. The next prime is 4444666691. The reversal of 4444666665 is 5666664444.

4444666665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4444666665 - 2² = 4444666661 is a prime.

It is a super-3 number, since 3×4444666665³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (4444666661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148155541 + ... + 148155570.

It is an arithmetic number, because the mean of its divisors is an integer number (888933336).

Almost surely, 2^4444666665 is an apocalyptic number.

It is an amenable number.

4444666665 is a deficient number, since it is larger than the sum of its proper divisors (2666800023).

4444666665 is a wasteful number, since it uses less digits than its factorization.

4444666665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296311119.

The product of its digits is 9953280, while the sum is 51.

The square root of 4444666665 is about 66668.3333000008. Note that the first 4 decimals coincide. The cubic root of 4444666665 is about 1644.1687845812.

It can be divided in two parts, 44446 and 66665, that added together give a palindrome (111111).

The spelling of 4444666665 in words is "four billion, four hundred forty-four million, six hundred sixty-six thousand, six hundred sixty-five".