2106663 has 16 divisors (see below), whose sum is σ = 3185280. Its totient is φ = 1227744.

The previous prime is 2106653. The next prime is 2106673. The reversal of 2106663 is 3666012.

It is an interprime number because it is at equal distance from previous prime (2106653) and next prime (2106673).

It is not a de Polignac number, because 2106663 - 2⁵ = 2106631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681 + ... + 2162.

It is an arithmetic number, because the mean of its divisors is an integer number (199080).

2^2106663 is an apocalyptic number.

2106663 is a deficient number, since it is larger than the sum of its proper divisors (1078617).

2106663 is a wasteful number, since it uses less digits than its factorization.

2106663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 2106663 is about 1451.4348073544. The cubic root of 2106663 is about 128.1932100022.

The spelling of 2106663 in words is "two million, one hundred six thousand, six hundred sixty-three".