2066667209 has 4 divisors (see below), whose sum is σ = 2071332816. Its totient is φ = 2062001604.

The previous prime is 2066667179. The next prime is 2066667217. The reversal of 2066667209 is 9027666602.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066667209 is a prime.

It is a super-2 number, since 2×2066667209² = 8542226705511699362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2066667209.

It is not an unprimeable number, because it can be changed into a prime (2066667269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332139 + ... + 2333024.

It is an arithmetic number, because the mean of its divisors is an integer number (517833204).

Almost surely, 2^2066667209 is an apocalyptic number.

It is an amenable number.

2066667209 is a deficient number, since it is larger than the sum of its proper divisors (4665607).

2066667209 is an equidigital number, since it uses as much as digits as its factorization.

2066667209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665606.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 2066667209 is about 45460.6116214905. The cubic root of 2066667209 is about 1273.7675562758.

The spelling of 2066667209 in words is "two billion, sixty-six million, six hundred sixty-seven thousand, two hundred nine".