11866811 has 8 divisors (see below), whose sum is σ = 13627200. Its totient is φ = 10220040.

The previous prime is 11866787. The next prime is 11866843.

11866811 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 11866811 - 2⁶ = 11866747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11866861) 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 7 ways as a sum of consecutive naturals, for example, 28181 + ... + 28598.

It is an arithmetic number, because the mean of its divisors is an integer number (1703400).

Almost surely, 2^11866811 is an apocalyptic number.

11866811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11866811 is a deficient number, since it is larger than the sum of its proper divisors (1760389).

11866811 is a wasteful number, since it uses less digits than its factorization.

11866811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56809.

The product of its digits is 2304, while the sum is 32.

The square root of 11866811 is about 3444.8237981064. The cubic root of 11866811 is about 228.0926767489.

It can be divided in two parts, 1186 and 6811, that added together give a palindrome (7997).

The spelling of 11866811 in words is "eleven million, eight hundred sixty-six thousand, eight hundred eleven".