6663888 has 120 divisors (see below), whose sum is σ = 23290176. Its totient is φ = 1728000.

The previous prime is 6663869. The next prime is 6663893. The reversal of 6663888 is 8883666.

6663888 is nontrivially palindromic in base 5.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10788 + ... + 11388.

Almost surely, 2^6663888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6663888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11645088).

6663888 is an abundant number, since it is smaller than the sum of its proper divisors (16626288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6663888 is a wasteful number, since it uses less digits than its factorization.

6663888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 624 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6663888 is about 2581.4507549051. The cubic root of 6663888 is about 188.1810538880.

It can be divided in two parts, 666 and 3888, that added together give a palindrome (4554).

The spelling of 6663888 in words is "six million, six hundred sixty-three thousand, eight hundred eighty-eight".