6685220 has 12 divisors (see below), whose sum is σ = 14039004. Its totient is φ = 2674080.

The previous prime is 6685201. The next prime is 6685247. The reversal of 6685220 is 225866.

6685220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2748964 + 3936256 = 1658^2 + 1984^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167111 + ... + 167150.

It is an arithmetic number, because the mean of its divisors is an integer number (1169917).

Almost surely, 2^6685220 is an apocalyptic number.

It is an amenable number.

6685220 is an abundant number, since it is smaller than the sum of its proper divisors (7353784).

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

6685220 is a wasteful number, since it uses less digits than its factorization.

6685220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334270 (or 334268 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 6685220 is about 2585.5792387780. The cubic root of 6685220 is about 188.3816376128.

The spelling of 6685220 in words is "six million, six hundred eighty-five thousand, two hundred twenty".