11931066 has 72 divisors (see below), whose sum is σ = 31056480. Its totient is φ = 3242448.

The previous prime is 11931061. The next prime is 11931079. The reversal of 11931066 is 66013911.

It is not an unprimeable number, because it can be changed into a prime (11931061) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 66565 + ... + 66743.

It is an arithmetic number, because the mean of its divisors is an integer number (431340).

Almost surely, 2^11931066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11931066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15528240).

11931066 is an abundant number, since it is smaller than the sum of its proper divisors (19125414).

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

11931066 is a wasteful number, since it uses less digits than its factorization.

11931066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 11931066 is about 3454.1375189763. The cubic root of 11931066 is about 228.5036189848.

Adding to 11931066 its reverse (66013911), we get a palindrome (77944977).

The spelling of 11931066 in words is "eleven million, nine hundred thirty-one thousand, sixty-six".