6681330 has 48 divisors (see below), whose sum is σ = 17670744. Its totient is φ = 1751040.

The previous prime is 6681329. The next prime is 6681359. The reversal of 6681330 is 331866.

6681330 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 4 ways, for example, as 2913849 + 3767481 = 1707^2 + 1941^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6681294 and 6681303.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4882 + ... + 6098.

Almost surely, 2^6681330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6681330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8835372).

6681330 is an abundant number, since it is smaller than the sum of its proper divisors (10989414).

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

6681330 is a wasteful number, since it uses less digits than its factorization.

6681330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6681330 is about 2584.8268800831. The cubic root of 6681330 is about 188.3450919817.

The spelling of 6681330 in words is "six million, six hundred eighty-one thousand, three hundred thirty".