3611665 has 4 divisors (see below), whose sum is σ = 4334004. Its totient is φ = 2889328.

The previous prime is 3611623. The next prime is 3611669. The reversal of 3611665 is 5661163.

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 625681 + 2985984 = 791^2 + 1728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3611665 is a prime.

It is a super-3 number, since 3×3611665³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3611669) 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, 361162 + ... + 361171.

It is an arithmetic number, because the mean of its divisors is an integer number (1083501).

Almost surely, 2^3611665 is an apocalyptic number.

It is an amenable number.

3611665 is a deficient number, since it is larger than the sum of its proper divisors (722339).

3611665 is an equidigital number, since it uses as much as digits as its factorization.

3611665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722338.

The product of its digits is 3240, while the sum is 28.

The square root of 3611665 is about 1900.4381073847. The cubic root of 3611665 is about 153.4272450329.

The spelling of 3611665 in words is "three million, six hundred eleven thousand, six hundred sixty-five".