6686550 has 120 divisors (see below), whose sum is σ = 20165376. Its totient is φ = 1632960.

The previous prime is 6686539. The next prime is 6686569. The reversal of 6686550 is 556866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 52587 + ... + 52713.

Almost surely, 2^6686550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6686550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10082688).

6686550 is an abundant number, since it is smaller than the sum of its proper divisors (13478826).

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

6686550 is a wasteful number, since it uses less digits than its factorization.

6686550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6686550 is about 2585.8364217406. The cubic root of 6686550 is about 188.3941293964.

The spelling of 6686550 in words is "six million, six hundred eighty-six thousand, five hundred fifty".