6665009 has 8 divisors (see below), whose sum is σ = 7490112. Its totient is φ = 5884560.

The previous prime is 6664997. The next prime is 6665011. The reversal of 6665009 is 9005666.

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

It is a cyclic number.

It is not a de Polignac number, because 6665009 - 2⁸ = 6664753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6665059) 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, 10847 + ... + 11444.

It is an arithmetic number, because the mean of its divisors is an integer number (936264).

Almost surely, 2^6665009 is an apocalyptic number.

It is an amenable number.

6665009 is a deficient number, since it is larger than the sum of its proper divisors (825103).

6665009 is a wasteful number, since it uses less digits than its factorization.

6665009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22327.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 6665009 is about 2581.6678717449. The cubic root of 6665009 is about 188.1916052425.

The spelling of 6665009 in words is "six million, six hundred sixty-five thousand, nine".