3666211 has 4 divisors (see below), whose sum is σ = 3675112. Its totient is φ = 3657312.

The previous prime is 3666197. The next prime is 3666233. The reversal of 3666211 is 1126663.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3666211 - 2¹³ = 3658019 is a prime.

It is a super-2 number, since 2×3666211² = 26882206193042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3666241) by changing a digit.

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, 3801 + ... + 4666.

It is an arithmetic number, because the mean of its divisors is an integer number (918778).

Almost surely, 2^3666211 is an apocalyptic number.

3666211 is a deficient number, since it is larger than the sum of its proper divisors (8901).

3666211 is an equidigital number, since it uses as much as digits as its factorization.

3666211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900.

The product of its digits is 1296, while the sum is 25.

The square root of 3666211 is about 1914.7352297380. The cubic root of 3666211 is about 154.1957790002.

The spelling of 3666211 in words is "three million, six hundred sixty-six thousand, two hundred eleven".