6505665 has 32 divisors (see below), whose sum is σ = 11024640. Its totient is φ = 3269376.

The previous prime is 6505663. The next prime is 6505699. The reversal of 6505665 is 5665056.

It is not a de Polignac number, because 6505665 - 2¹ = 6505663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6505663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37519 + ... + 37691.

It is an arithmetic number, because the mean of its divisors is an integer number (344520).

Almost surely, 2^6505665 is an apocalyptic number.

It is an amenable number.

6505665 is a deficient number, since it is larger than the sum of its proper divisors (4518975).

6505665 is a wasteful number, since it uses less digits than its factorization.

6505665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 6505665 is about 2550.6205127380. The cubic root of 6505665 is about 186.6797592149.

The spelling of 6505665 in words is "six million, five hundred five thousand, six hundred sixty-five".