6681420 has 48 divisors (see below), whose sum is σ = 20788320. Its totient is φ = 1781568.

The previous prime is 6681419. The next prime is 6681421. The reversal of 6681420 is 241866.

It is an interprime number because it is at equal distance from previous prime (6681419) and next prime (6681421).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6681421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5647 + ... + 6726.

It is an arithmetic number, because the mean of its divisors is an integer number (433090).

Almost surely, 2^6681420 is an apocalyptic number.

6681420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6681420 is an abundant number, since it is smaller than the sum of its proper divisors (14106900).

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

6681420 is a wasteful number, since it uses less digits than its factorization.

6681420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12391 (or 12383 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 6681420 is about 2584.8442893142. The cubic root of 6681420 is about 188.3459376707.

The spelling of 6681420 in words is "six million, six hundred eighty-one thousand, four hundred twenty".