1166655 has 32 divisors (see below), whose sum is σ = 2193408. Its totient is φ = 518400.

The previous prime is 1166639. The next prime is 1166663. The reversal of 1166655 is 5566611.

It is not a de Polignac number, because 1166655 - 2⁴ = 1166639 is a prime.

It is a super-2 number, since 2×1166655² = 2722167778050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4170 + ... + 4440.

It is an arithmetic number, because the mean of its divisors is an integer number (68544).

2^1166655 is an apocalyptic number.

1166655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1166655 is a deficient number, since it is larger than the sum of its proper divisors (1026753).

1166655 is a wasteful number, since it uses less digits than its factorization.

1166655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its digits is 5400, while the sum is 30.

The square root of 1166655 is about 1080.1180491039. The cubic root of 1166655 is about 105.2723090509.

It can be divided in two parts, 11 and 66655, that added together give a palindrome (66666).

The spelling of 1166655 in words is "one million, one hundred sixty-six thousand, six hundred fifty-five".