6668838 has 64 divisors (see below), whose sum is σ = 16473600. Its totient is φ = 1982880.

The previous prime is 6668833. The next prime is 6668839. The reversal of 6668838 is 8388666.

It is a junction number, because it is equal to n+sod(n) for n = 6668793 and 6668802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61128 + ... + 61236.

It is an arithmetic number, because the mean of its divisors is an integer number (257400).

Almost surely, 2^6668838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6668838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8236800).

6668838 is an abundant number, since it is smaller than the sum of its proper divisors (9804762).

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

6668838 is a wasteful number, since it uses less digits than its factorization.

6668838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 228 counting only the distinct ones).

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

The square root of 6668838 is about 2582.4093401318. The cubic root of 6668838 is about 188.2276365872.

The spelling of 6668838 in words is "six million, six hundred sixty-eight thousand, eight hundred thirty-eight".