1006663 has 8 divisors (see below), whose sum is σ = 1187840. Its totient is φ = 834840.

The previous prime is 1006651. The next prime is 1006711. The reversal of 1006663 is 3666001.

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 1006663 - 2⁹ = 1006151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2103 + ... + 2536.

It is an arithmetic number, because the mean of its divisors is an integer number (148480).

2^1006663 is an apocalyptic number.

1006663 is a deficient number, since it is larger than the sum of its proper divisors (181177).

1006663 is an equidigital number, since it uses as much as digits as its factorization.

1006663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1006663 is about 1003.3259689652. The cubic root of 1006663 is about 100.2216085338.

The spelling of 1006663 in words is "one million, six thousand, six hundred sixty-three".