11801166 has 32 divisors (see below), whose sum is σ = 26759040. Its totient is φ = 3439584.

The previous prime is 11801149. The next prime is 11801177. The reversal of 11801166 is 66110811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500 + ... + 5463.

It is an arithmetic number, because the mean of its divisors is an integer number (836220).

Almost surely, 2^11801166 is an apocalyptic number.

11801166 is an abundant number, since it is smaller than the sum of its proper divisors (14957874).

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

11801166 is a wasteful number, since it uses less digits than its factorization.

11801166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8000.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 11801166 is about 3435.2825211327. The cubic root of 11801166 is about 227.6713100065.

Adding to 11801166 its reverse (66110811), we get a palindrome (77911977).

It can be divided in two parts, 1180 and 1166, that added together give a triangular number (2346 = T₆₈).

The spelling of 11801166 in words is "eleven million, eight hundred one thousand, one hundred sixty-six".