6609665 has 8 divisors (see below), whose sum is σ = 8187648. Its totient is φ = 5117040.

The previous prime is 6609661. The next prime is 6609667. The reversal of 6609665 is 5669066.

6609665 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 6609665 - 2² = 6609661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6609661) 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, 21167 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (1023456).

Almost surely, 2^6609665 is an apocalyptic number.

It is an amenable number.

6609665 is a deficient number, since it is larger than the sum of its proper divisors (1577983).

6609665 is a wasteful number, since it uses less digits than its factorization.

6609665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42679.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 6609665 is about 2570.9268756618. The cubic root of 6609665 is about 187.6692634497.

The spelling of 6609665 in words is "six million, six hundred nine thousand, six hundred sixty-five".