6684780 has 48 divisors (see below), whose sum is σ = 19160064. Its totient is φ = 1740480.

The previous prime is 6684779. The next prime is 6684781. The reversal of 6684780 is 874866.

It is an interprime number because it is at equal distance from previous prime (6684779) and next prime (6684781).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6684781) 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, 1285 + ... + 3875.

It is an arithmetic number, because the mean of its divisors is an integer number (399168).

Almost surely, 2^6684780 is an apocalyptic number.

6684780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6684780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9580032).

6684780 is an abundant number, since it is smaller than the sum of its proper divisors (12475284).

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

6684780 is a wasteful number, since it uses less digits than its factorization.

6684780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646 (or 2644 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 6684780 is about 2585.4941500611. The cubic root of 6684780 is about 188.3775046279.

The spelling of 6684780 in words is "six million, six hundred eighty-four thousand, seven hundred eighty".