6605665 has 8 divisors (see below), whose sum is σ = 8647488. Its totient is φ = 4804080.

The previous prime is 6605663. The next prime is 6605693. The reversal of 6605665 is 5665066.

6605665 = T₄₁₄ + T₄₁₅ + ... + T₄₇₉.

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

It is not a de Polignac number, because 6605665 - 2¹ = 6605663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6605665.

It is not an unprimeable number, because it can be changed into a prime (6605663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59997 + ... + 60106.

It is an arithmetic number, because the mean of its divisors is an integer number (1080936).

Almost surely, 2^6605665 is an apocalyptic number.

It is an amenable number.

6605665 is a deficient number, since it is larger than the sum of its proper divisors (2041823).

6605665 is a wasteful number, since it uses less digits than its factorization.

6605665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120119.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 6605665 is about 2570.1488283755. The cubic root of 6605665 is about 187.6313982662.

The spelling of 6605665 in words is "six million, six hundred five thousand, six hundred sixty-five".