2206665 has 12 divisors (see below), whose sum is σ = 3824964. Its totient is φ = 1176864.

The previous prime is 2206663. The next prime is 2206669. The reversal of 2206665 is 5666022.

2206665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 558009 = 1284^2 + 747^2 .

It is not a de Polignac number, because 2206665 - 2¹ = 2206663 is a prime.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2206663) by changing a digit.

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, 24474 + ... + 24563.

It is an arithmetic number, because the mean of its divisors is an integer number (318747).

2^2206665 is an apocalyptic number.

It is an amenable number.

2206665 is a deficient number, since it is larger than the sum of its proper divisors (1618299).

2206665 is a wasteful number, since it uses less digits than its factorization.

2206665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49048 (or 49045 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2206665 is about 1485.4847693598. The cubic root of 2206665 is about 130.1903523046.

The spelling of 2206665 in words is "two million, two hundred six thousand, six hundred sixty-five".