2066909 has 4 divisors (see below), whose sum is σ = 2225916. Its totient is φ = 1907904.

The previous prime is 2066903. The next prime is 2066923. The reversal of 2066909 is 9096602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1060900 + 1006009 = 1030^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066909 - 2⁴ = 2066893 is a prime.

It is a super-2 number, since 2×2066909² = 8544225628562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066903) 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, 79484 + ... + 79509.

It is an arithmetic number, because the mean of its divisors is an integer number (556479).

2^2066909 is an apocalyptic number.

It is an amenable number.

2066909 is a deficient number, since it is larger than the sum of its proper divisors (159007).

2066909 is a wasteful number, since it uses less digits than its factorization.

2066909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159006.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 2066909 is about 1437.6748589302. The cubic root of 2066909 is about 127.3817229411.

The spelling of 2066909 in words is "two million, sixty-six thousand, nine hundred nine".