6600663 has 16 divisors (see below), whose sum is σ = 9849600. Its totient is φ = 4368600.

The previous prime is 6600623. The next prime is 6600667. The reversal of 6600663 is 3660066.

It is not a de Polignac number, because 6600663 - 2¹⁰ = 6599639 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6600667) 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, 3268 + ... + 4886.

It is an arithmetic number, because the mean of its divisors is an integer number (615600).

Almost surely, 2^6600663 is an apocalyptic number.

6600663 is a deficient number, since it is larger than the sum of its proper divisors (3248937).

6600663 is a wasteful number, since it uses less digits than its factorization.

6600663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 6600663 is about 2569.1755486926. The cubic root of 6600663 is about 187.5840263388.

The spelling of 6600663 in words is "six million, six hundred thousand, six hundred sixty-three".