11161566 has 24 divisors (see below), whose sum is σ = 26044200. Its totient is φ = 3434256.

The previous prime is 11161559. The next prime is 11161567. The reversal of 11161566 is 66516111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23616 + ... + 24083.

It is an arithmetic number, because the mean of its divisors is an integer number (1085175).

Almost surely, 2^11161566 is an apocalyptic number.

11161566 is an abundant number, since it is smaller than the sum of its proper divisors (14882634).

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

11161566 is a wasteful number, since it uses less digits than its factorization.

11161566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47720 (or 47717 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 11161566 is about 3340.8929943954. The cubic root of 11161566 is about 223.4815683793.

Adding to 11161566 its reverse (66516111), we get a palindrome (77677677).

The spelling of 11161566 in words is "eleven million, one hundred sixty-one thousand, five hundred sixty-six".