6686736 has 60 divisors (see below), whose sum is σ = 20101392. Its totient is φ = 1909824.

The previous prime is 6686723. The next prime is 6686747. The reversal of 6686736 is 6376866.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 931 + ... + 3773.

Almost surely, 2^6686736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6686736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10050696).

6686736 is an abundant number, since it is smaller than the sum of its proper divisors (13414656).

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

6686736 is a wasteful number, since it uses less digits than its factorization.

6686736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2855 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 6686736 is about 2585.8723866425. The cubic root of 6686736 is about 188.3958762356.

The spelling of 6686736 in words is "six million, six hundred eighty-six thousand, seven hundred thirty-six".