11581966 has 8 divisors (see below), whose sum is σ = 18952344. Its totient is φ = 5264520.

The previous prime is 11581957. The next prime is 11581979. The reversal of 11581966 is 66918511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 263205 + ... + 263248.

It is an arithmetic number, because the mean of its divisors is an integer number (2369043).

Almost surely, 2^11581966 is an apocalyptic number.

11581966 is a deficient number, since it is larger than the sum of its proper divisors (7370378).

11581966 is a wasteful number, since it uses less digits than its factorization.

11581966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526466.

The product of its digits is 12960, while the sum is 37.

The square root of 11581966 is about 3403.2287610444. The cubic root of 11581966 is about 226.2528691272.

The spelling of 11581966 in words is "eleven million, five hundred eighty-one thousand, nine hundred sixty-six".