3668181 has 16 divisors (see below), whose sum is σ = 5520960. Its totient is φ = 2145920.

The previous prime is 3668179. The next prime is 3668213. The reversal of 3668181 is 1818663.

It is a cyclic number.

It is not a de Polignac number, because 3668181 - 2¹ = 3668179 is a prime.

It is a super-2 number, since 2×3668181² = 26911103697522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3668081) 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, 960 + ... + 2873.

It is an arithmetic number, because the mean of its divisors is an integer number (345060).

Almost surely, 2^3668181 is an apocalyptic number.

It is an amenable number.

3668181 is a deficient number, since it is larger than the sum of its proper divisors (1852779).

3668181 is a wasteful number, since it uses less digits than its factorization.

3668181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876.

The product of its digits is 6912, while the sum is 33.

The square root of 3668181 is about 1915.2495920898. The cubic root of 3668181 is about 154.2233925493.

The spelling of 3668181 in words is "three million, six hundred sixty-eight thousand, one hundred eighty-one".