11791566 has 12 divisors (see below), whose sum is σ = 25548432. Its totient is φ = 3930516.

The previous prime is 11791553. The next prime is 11791597. The reversal of 11791566 is 66519711.

It is a happy number.

11791566 is a `hidden beast` number, since 1 + 1 + 7 + 91 + 566 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 11791566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 327526 + ... + 327561.

It is an arithmetic number, because the mean of its divisors is an integer number (2129036).

Almost surely, 2^11791566 is an apocalyptic number.

11791566 is an abundant number, since it is smaller than the sum of its proper divisors (13756866).

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

11791566 is a wasteful number, since it uses less digits than its factorization.

11791566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655095 (or 655092 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 11791566 is about 3433.8849718650. The cubic root of 11791566 is about 227.6095579868.

The spelling of 11791566 in words is "eleven million, seven hundred ninety-one thousand, five hundred sixty-six".