11966658 has 48 divisors (see below), whose sum is σ = 26889408. Its totient is φ = 3546400.

The previous prime is 11966653. The next prime is 11966659. The reversal of 11966658 is 85666911.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11966653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38323 + ... + 38633.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

Almost surely, 2^11966658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11966658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13444704).

11966658 is an abundant number, since it is smaller than the sum of its proper divisors (14922750).

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

11966658 is a wasteful number, since it uses less digits than its factorization.

11966658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 380 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 11966658 is about 3459.2857644317. The cubic root of 11966658 is about 228.7306125884.

It can be divided in two parts, 11 and 966658, that added together give a palindrome (966669).

The spelling of 11966658 in words is "eleven million, nine hundred sixty-six thousand, six hundred fifty-eight".