3665617 has 4 divisors (see below), whose sum is σ = 3672756. Its totient is φ = 3658480.

The previous prime is 3665609. The next prime is 3665633. The reversal of 3665617 is 7165663.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 3094081 = 756^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 3665617 - 2³ = 3665609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3665677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2734 + ... + 3847.

It is an arithmetic number, because the mean of its divisors is an integer number (918189).

Almost surely, 2^3665617 is an apocalyptic number.

It is an amenable number.

3665617 is a deficient number, since it is larger than the sum of its proper divisors (7139).

3665617 is an equidigital number, since it uses as much as digits as its factorization.

3665617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138.

The product of its digits is 22680, while the sum is 34.

The square root of 3665617 is about 1914.5801106248. The cubic root of 3665617 is about 154.1874509434.

The spelling of 3665617 in words is "three million, six hundred sixty-five thousand, six hundred seventeen".