11665612 has 12 divisors (see below), whose sum is σ = 23331280. Its totient is φ = 4999536.

The previous prime is 11665603. The next prime is 11665613. The reversal of 11665612 is 21656611.

11665612 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 416629 = 11665612 / (1 + 1 + 6 + 6 + 5 + 6 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (11665613) 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, 208287 + ... + 208342.

Almost surely, 2^11665612 is an apocalyptic number.

It is an amenable number.

11665612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11665612 is a wasteful number, since it uses less digits than its factorization.

11665612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416640 (or 416638 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 11665612 is about 3415.4958644390. The cubic root of 11665612 is about 226.7962359933.

Subtracting 11665612 from its reverse (21656611), we obtain a palindrome (9990999).

The spelling of 11665612 in words is "eleven million, six hundred sixty-five thousand, six hundred twelve".