3665613 has 16 divisors (see below), whose sum is σ = 5880320. Its totient is φ = 1984176.

The previous prime is 3665609. The next prime is 3665633. The reversal of 3665613 is 3165663.

It is not a de Polignac number, because 3665613 - 2² = 3665609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4195 + ... + 4992.

It is an arithmetic number, because the mean of its divisors is an integer number (367520).

Almost surely, 2^3665613 is an apocalyptic number.

It is an amenable number.

3665613 is a deficient number, since it is larger than the sum of its proper divisors (2214707).

3665613 is a wasteful number, since it uses less digits than its factorization.

3665613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216.

The product of its digits is 9720, while the sum is 30.

The square root of 3665613 is about 1914.5790660090. The cubic root of 3665613 is about 154.1873948592.

It can be divided in two parts, 3665 and 613, that added together give a triangular number (4278 = T₉₂).

The spelling of 3665613 in words is "three million, six hundred sixty-five thousand, six hundred thirteen".