6680000 has 70 divisors (see below), whose sum is σ = 16663416. Its totient is φ = 2656000.

The previous prime is 6679999. The next prime is 6680021. The reversal of 6680000 is 866.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39917 + ... + 40083.

Almost surely, 2^6680000 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 6680000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8331708).

6680000 is an abundant number, since it is smaller than the sum of its proper divisors (9983416).

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

6680000 is an equidigital number, since it uses as much as digits as its factorization.

6680000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 6680000 is about 2584.5695966640. The cubic root of 6680000 is about 188.3325936919.

Adding to 6680000 its reverse (866), we get a palindrome (6680866).

The spelling of 6680000 in words is "six million, six hundred eighty thousand".