11671566 has 8 divisors (see below), whose sum is σ = 23343144. Its totient is φ = 3890520.

The previous prime is 11671547. The next prime is 11671573. The reversal of 11671566 is 66517611.

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

11671566 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972625 + ... + 972636.

It is an arithmetic number, because the mean of its divisors is an integer number (2917893).

Almost surely, 2^11671566 is an apocalyptic number.

11671566 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.

11671566 is a wasteful number, since it uses less digits than its factorization.

11671566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945266.

The product of its digits is 7560, while the sum is 33.

The square root of 11671566 is about 3416.3673690047. The cubic root of 11671566 is about 226.8348141985.

The spelling of 11671566 in words is "eleven million, six hundred seventy-one thousand, five hundred sixty-six".