1166566 has 8 divisors (see below), whose sum is σ = 1755000. Its totient is φ = 581568.

The previous prime is 1166563. The next prime is 1166567. The reversal of 1166566 is 6656611.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166563) 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 3 ways as a sum of consecutive naturals, for example, 310 + ... + 1558.

It is an arithmetic number, because the mean of its divisors is an integer number (219375).

2^1166566 is an apocalyptic number.

1166566 is a deficient number, since it is larger than the sum of its proper divisors (588434).

1166566 is a wasteful number, since it uses less digits than its factorization.

1166566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718.

The product of its digits is 6480, while the sum is 31.

The square root of 1166566 is about 1080.0768491177. The cubic root of 1166566 is about 105.2696320316.

It can be divided in two parts, 1166 and 566, that multiplied together give a palindrome (659956).

The spelling of 1166566 in words is "one million, one hundred sixty-six thousand, five hundred sixty-six".