11143666 has 4 divisors (see below), whose sum is σ = 16715502. Its totient is φ = 5571832.

The previous prime is 11143631. The next prime is 11143667. The reversal of 11143666 is 66634111.

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

It can be written as a sum of positive squares in only one way, i.e., 6175225 + 4968441 = 2485^2 + 2229^2 .

It is not an unprimeable number, because it can be changed into a prime (11143667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2785915 + ... + 2785918.

Almost surely, 2^11143666 is an apocalyptic number.

11143666 is a deficient number, since it is larger than the sum of its proper divisors (5571836).

11143666 is an equidigital number, since it uses as much as digits as its factorization.

11143666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571835.

The product of its digits is 2592, while the sum is 28.

The square root of 11143666 is about 3338.2129950020. The cubic root of 11143666 is about 223.3620373492.

Adding to 11143666 its reverse (66634111), we get a palindrome (77777777).

The spelling of 11143666 in words is "eleven million, one hundred forty-three thousand, six hundred sixty-six".