6441003665 has 8 divisors (see below), whose sum is σ = 7745900928. Its totient is φ = 5141671920.

The previous prime is 6441003643. The next prime is 6441003683. The reversal of 6441003665 is 5663001446.

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

It is not a de Polignac number, because 6441003665 - 2¹² = 6440999569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1388831 + ... + 1393460.

It is an arithmetic number, because the mean of its divisors is an integer number (968237616).

Almost surely, 2^6441003665 is an apocalyptic number.

It is an amenable number.

6441003665 is a deficient number, since it is larger than the sum of its proper divisors (1304897263).

6441003665 is a wasteful number, since it uses less digits than its factorization.

6441003665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782759.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6441003665 is about 80255.8637421591. The cubic root of 6441003665 is about 1860.5921405437.

The spelling of 6441003665 in words is "six billion, four hundred forty-one million, three thousand, six hundred sixty-five".