1166580 has 36 divisors (see below), whose sum is σ = 3539172. Its totient is φ = 311040.

The previous prime is 1166579. The next prime is 1166597. The reversal of 1166580 is 856611.

1166580 is a `hidden beast` number, since 1 + 1 + 6 + 658 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 820836 + 345744 = 906^2 + 588^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 3061 + ... + 3420.

2^1166580 is an apocalyptic number.

1166580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166580 is an abundant number, since it is smaller than the sum of its proper divisors (2372592).

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

1166580 is a wasteful number, since it uses less digits than its factorization.

1166580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6496 (or 6491 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1166580 is about 1080.0833301186. The cubic root of 1166580 is about 105.2700531448.

The spelling of 1166580 in words is "one million, one hundred sixty-six thousand, five hundred eighty".