6663388 has 48 divisors (see below), whose sum is σ = 13305600. Its totient is φ = 2903040.

The previous prime is 6663383. The next prime is 6663389. The reversal of 6663388 is 8833666.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6663388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663383) 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 15 ways as a sum of consecutive naturals, for example, 61078 + ... + 61186.

It is an arithmetic number, because the mean of its divisors is an integer number (277200).

Almost surely, 2^6663388 is an apocalyptic number.

6663388 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6663388 is a deficient number, since it is larger than the sum of its proper divisors (6642212).

6663388 is a wasteful number, since it uses less digits than its factorization.

6663388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 188 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 6663388 is about 2581.3539083202. The cubic root of 6663388 is about 188.1763472823.

The spelling of 6663388 in words is "six million, six hundred sixty-three thousand, three hundred eighty-eight".