2006663 has 8 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 1841920.

The previous prime is 2006659. The next prime is 2006671. The reversal of 2006663 is 3666002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2006663 - 2² = 2006659 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 0 + 0 + 6² + 6⁴ + 6⁷ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743 + ... + 2136.

It is an arithmetic number, because the mean of its divisors is an integer number (272160).

2^2006663 is an apocalyptic number.

2006663 is a deficient number, since it is larger than the sum of its proper divisors (170617).

2006663 is a wasteful number, since it uses less digits than its factorization.

2006663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 2006663 is about 1416.5673298506. The cubic root of 2006663 is about 126.1318641343.

The spelling of 2006663 in words is "two million, six thousand, six hundred sixty-three".