1066609 has 4 divisors (see below), whose sum is σ = 1071616. Its totient is φ = 1061604.

The previous prime is 1066577. The next prime is 1066619. The reversal of 1066609 is 9066601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9066601 = 31 ⋅292471.

It is a cyclic number.

It is not a de Polignac number, because 1066609 - 2⁵ = 1066577 is a prime.

It is a super-2 number, since 2×1066609² = 2275309517762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2169 + ... + 2614.

It is an arithmetic number, because the mean of its divisors is an integer number (267904).

2^1066609 is an apocalyptic number.

It is an amenable number.

1066609 is a deficient number, since it is larger than the sum of its proper divisors (5007).

1066609 is an equidigital number, since it uses as much as digits as its factorization.

1066609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1066609 is about 1032.7676408564. The cubic root of 1066609 is about 102.1727496813.

The spelling of 1066609 in words is "one million, sixty-six thousand, six hundred nine".