6685780 has 12 divisors (see below), whose sum is σ = 14040180. Its totient is φ = 2674304.

The previous prime is 6685759. The next prime is 6685781. The reversal of 6685780 is 875866.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 5846724 = 916^2 + 2418^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167125 + ... + 167164.

It is an arithmetic number, because the mean of its divisors is an integer number (1170015).

Almost surely, 2^6685780 is an apocalyptic number.

It is an amenable number.

6685780 is an abundant number, since it is smaller than the sum of its proper divisors (7354400).

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

6685780 is a wasteful number, since it uses less digits than its factorization.

6685780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334298 (or 334296 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 6685780 is about 2585.6875294590. The cubic root of 6685780 is about 188.3868975130.

The spelling of 6685780 in words is "six million, six hundred eighty-five thousand, seven hundred eighty".