3600665 has 4 divisors (see below), whose sum is σ = 4320804. Its totient is φ = 2880528.

The previous prime is 3600659. The next prime is 3600679. The reversal of 3600665 is 5660063.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5660063 = 149 ⋅37987.

It can be written as a sum of positive squares in 2 ways, for example, as 2262016 + 1338649 = 1504^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 3600665 - 2⁶ = 3600601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360062 + ... + 360071.

It is an arithmetic number, because the mean of its divisors is an integer number (1080201).

Almost surely, 2^3600665 is an apocalyptic number.

It is an amenable number.

3600665 is a deficient number, since it is larger than the sum of its proper divisors (720139).

3600665 is an equidigital number, since it uses as much as digits as its factorization.

3600665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720138.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 3600665 is about 1897.5418308960. The cubic root of 3600665 is about 153.2713228564.

The spelling of 3600665 in words is "three million, six hundred thousand, six hundred sixty-five".