11666211 has 16 divisors (see below), whose sum is σ = 16080384. Its totient is φ = 7517664.

The previous prime is 11666191. The next prime is 11666227. The reversal of 11666211 is 11266611.

It is not a de Polignac number, because 11666211 - 2⁹ = 11665699 is a prime.

It is a super-3 number, since 3×11666211³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (11666251) 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, 24966 + ... + 25428.

It is an arithmetic number, because the mean of its divisors is an integer number (1005024).

Almost surely, 2^11666211 is an apocalyptic number.

11666211 is a deficient number, since it is larger than the sum of its proper divisors (4414173).

11666211 is a wasteful number, since it uses less digits than its factorization.

11666211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730.

The product of its digits is 432, while the sum is 24.

The square root of 11666211 is about 3415.5835518986. The cubic root of 11666211 is about 226.8001177334.

The spelling of 11666211 in words is "eleven million, six hundred sixty-six thousand, two hundred eleven".