11091666 has 16 divisors (see below), whose sum is σ = 22241088. Its totient is φ = 3687600.

The previous prime is 11091643. The next prime is 11091673. The reversal of 11091666 is 66619011.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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, 331 + ... + 4721.

It is an arithmetic number, because the mean of its divisors is an integer number (1390068).

Almost surely, 2^11091666 is an apocalyptic number.

11091666 is an abundant number, since it is smaller than the sum of its proper divisors (11149422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11091666 is a wasteful number, since it uses less digits than its factorization.

11091666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 11091666 is about 3330.4152894196. The cubic root of 11091666 is about 223.0140687029.

It can be divided in two parts, 1109 and 1666, that added together give a triangular number (2775 = T₇₄).

The spelling of 11091666 in words is "eleven million, ninety-one thousand, six hundred sixty-six".