6609663 has 12 divisors (see below), whose sum is σ = 10050040. Its totient is φ = 4174416.

The previous prime is 6609661. The next prime is 6609667. The reversal of 6609663 is 3669066.

It is not a de Polignac number, because 6609663 - 2¹ = 6609661 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 (6609661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19156 + ... + 19497.

Almost surely, 2^6609663 is an apocalyptic number.

6609663 is a deficient number, since it is larger than the sum of its proper divisors (3440377).

6609663 is a wasteful number, since it uses less digits than its factorization.

6609663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38678 (or 38675 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 6609663 is about 2570.9264866970. The cubic root of 6609663 is about 187.6692445209.

It can be divided in two parts, 660966 and 3, that added together give a square (660969 = 813²).

The spelling of 6609663 in words is "six million, six hundred nine thousand, six hundred sixty-three".