6699888 has 80 divisors (see below), whose sum is σ = 20727840. Its totient is φ = 2059776.

The previous prime is 6699881. The next prime is 6699893. The reversal of 6699888 is 8889966.

6699888 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is an Ulam number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699881) 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, 5020 + ... + 6212.

It is an arithmetic number, because the mean of its divisors is an integer number (259098).

Almost surely, 2^6699888 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 6699888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10363920).

6699888 is an abundant number, since it is smaller than the sum of its proper divisors (14027952).

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

6699888 is a wasteful number, since it uses less digits than its factorization.

6699888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1211 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 6699888 is about 2588.4141863311. The cubic root of 6699888 is about 188.5193126345.

The spelling of 6699888 in words is "six million, six hundred ninety-nine thousand, eight hundred eighty-eight".