6686280 has 128 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 1728000.

The previous prime is 6686279. The next prime is 6686299. The reversal of 6686280 is 826866.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44205 + ... + 44355.

It is an arithmetic number, because the mean of its divisors is an integer number (179550).

Almost surely, 2^6686280 is an apocalyptic number.

6686280 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 6686280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11491200).

6686280 is an abundant number, since it is smaller than the sum of its proper divisors (16296120).

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

6686280 is a wasteful number, since it uses less digits than its factorization.

6686280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 6686280 is about 2585.7842137348. The cubic root of 6686280 is about 188.3915936044.

The spelling of 6686280 in words is "six million, six hundred eighty-six thousand, two hundred eighty".