11066821 has 4 divisors (see below), whose sum is σ = 11116672. Its totient is φ = 11016972.

The previous prime is 11066819. The next prime is 11066831. The reversal of 11066821 is 12866011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11066821 - 2¹ = 11066819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11066831) 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, 24591 + ... + 25036.

It is an arithmetic number, because the mean of its divisors is an integer number (2779168).

Almost surely, 2^11066821 is an apocalyptic number.

It is an amenable number.

11066821 is a deficient number, since it is larger than the sum of its proper divisors (49851).

11066821 is an equidigital number, since it uses as much as digits as its factorization.

11066821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49850.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11066821 is about 3326.6831829917. The cubic root of 11066821 is about 222.8474292712.

The spelling of 11066821 in words is "eleven million, sixty-six thousand, eight hundred twenty-one".