2065665 has 32 divisors (see below), whose sum is σ = 3833856. Its totient is φ = 930240.

The previous prime is 2065663. The next prime is 2065667. The reversal of 2065665 is 5665602.

It is an interprime number because it is at equal distance from previous prime (2065663) and next prime (2065667).

It is not a de Polignac number, because 2065665 - 2¹ = 2065663 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2065663) 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, 10720 + ... + 10910.

It is an arithmetic number, because the mean of its divisors is an integer number (119808).

2^2065665 is an apocalyptic number.

It is an amenable number.

2065665 is a deficient number, since it is larger than the sum of its proper divisors (1768191).

2065665 is a wasteful number, since it uses less digits than its factorization.

2065665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2065665 is about 1437.2421507874. The cubic root of 2065665 is about 127.3561622827.

The spelling of 2065665 in words is "two million, sixty-five thousand, six hundred sixty-five".