3665181 has 8 divisors (see below), whose sum is σ = 5262880. Its totient is φ = 2255472.

The previous prime is 3665177. The next prime is 3665203. The reversal of 3665181 is 1815663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3665181 - 2² = 3665177 is a prime.

It is a super-2 number, since 2×3665181² = 26867103525522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46951 + ... + 47028.

It is an arithmetic number, because the mean of its divisors is an integer number (657860).

Almost surely, 2^3665181 is an apocalyptic number.

It is an amenable number.

3665181 is a deficient number, since it is larger than the sum of its proper divisors (1597699).

3665181 is a wasteful number, since it uses less digits than its factorization.

3665181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93995.

The product of its digits is 4320, while the sum is 30.

The square root of 3665181 is about 1914.4662441527. The cubic root of 3665181 is about 154.1813375211.

The spelling of 3665181 in words is "three million, six hundred sixty-five thousand, one hundred eighty-one".