6616009 has 8 divisors (see below), whose sum is σ = 7374240. Its totient is φ = 5898816.

The previous prime is 6616003. The next prime is 6616021. The reversal of 6616009 is 9006166.

It is a happy number.

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

It is not a de Polignac number, because 6616009 - 2⁵ = 6615977 is a prime.

It is a Duffinian number.

6616009 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6616003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9919 + ... + 10564.

It is an arithmetic number, because the mean of its divisors is an integer number (921780).

Almost surely, 2^6616009 is an apocalyptic number.

It is an amenable number.

6616009 is a deficient number, since it is larger than the sum of its proper divisors (758231).

6616009 is a wasteful number, since it uses less digits than its factorization.

6616009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20519.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 6616009 is about 2572.1603760263. The cubic root of 6616009 is about 187.7292863154.

It can be divided in two parts, 661 and 6009, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 6616009 in words is "six million, six hundred sixteen thousand, nine".