11662111 has 4 divisors (see below), whose sum is σ = 11732112. Its totient is φ = 11592112.

The previous prime is 11662109. The next prime is 11662151. The reversal of 11662111 is 11126611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11126611 = 109 ⋅102079.

It is a cyclic number.

It is not a de Polignac number, because 11662111 - 2¹ = 11662109 is a prime.

It is a Duffinian number.

11662111 is a Rhonda number in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11662151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34750 + ... + 35083.

It is an arithmetic number, because the mean of its divisors is an integer number (2933028).

Almost surely, 2^11662111 is an apocalyptic number.

11662111 is a deficient number, since it is larger than the sum of its proper divisors (70001).

11662111 is an equidigital number, since it uses as much as digits as its factorization.

11662111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70000.

The product of its digits is 72, while the sum is 19.

The square root of 11662111 is about 3414.9833088904. The cubic root of 11662111 is about 226.7735455688.

Adding to 11662111 its reverse (11126611), we get a palindrome (22788722).

The spelling of 11662111 in words is "eleven million, six hundred sixty-two thousand, one hundred eleven".