6668420 has 48 divisors (see below), whose sum is σ = 16184448. Its totient is φ = 2280960.

The previous prime is 6668419. The next prime is 6668423. The reversal of 6668420 is 248666.

It is a happy number.

6668420 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (6668423) 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, 2849 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (337176).

Almost surely, 2^6668420 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 6668420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8092224).

6668420 is an abundant number, since it is smaller than the sum of its proper divisors (9516028).

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

6668420 is a wasteful number, since it uses less digits than its factorization.

6668420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 6668420 is about 2582.3284066904. The cubic root of 6668420 is about 188.2237038283.

It can be divided in two parts, 66 and 68420, that added together give a palindrome (68486).

The spelling of 6668420 in words is "six million, six hundred sixty-eight thousand, four hundred twenty".