3666218 has 8 divisors (see below), whose sum is σ = 5507460. Its totient is φ = 1830400.

The previous prime is 3666197. The next prime is 3666233. The reversal of 3666218 is 8126663.

It can be written as a sum of positive squares in 2 ways, for example, as 2111209 + 1555009 = 1453^2 + 1247^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898 + ... + 3306.

Almost surely, 2^3666218 is an apocalyptic number.

3666218 is a deficient number, since it is larger than the sum of its proper divisors (1841242).

3666218 is a wasteful number, since it uses less digits than its factorization.

3666218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712.

The product of its digits is 10368, while the sum is 32.

The square root of 3666218 is about 1914.7370576661. The cubic root of 3666218 is about 154.1958771369.

The spelling of 3666218 in words is "three million, six hundred sixty-six thousand, two hundred eighteen".