1066809 has 8 divisors (see below), whose sum is σ = 1484352. Its totient is φ = 680240.

The previous prime is 1066789. The next prime is 1066811. The reversal of 1066809 is 9086601.

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

It is a cyclic number.

It is not a de Polignac number, because 1066809 - 2⁵ = 1066777 is a prime.

It is a super-2 number, since 2×1066809² = 2276162884962, which contains 22 as substring.

1066809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1066859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7662 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (185544).

2^1066809 is an apocalyptic number.

It is an amenable number.

1066809 is a deficient number, since it is larger than the sum of its proper divisors (417543).

1066809 is a wasteful number, since it uses less digits than its factorization.

1066809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15487.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1066809 is about 1032.8644635188. The cubic root of 1066809 is about 102.1791354243.

The spelling of 1066809 in words is "one million, sixty-six thousand, eight hundred nine".