6646836 has 48 divisors (see below), whose sum is σ = 18071424. Its totient is φ = 1862016.

The previous prime is 6646831. The next prime is 6646837. The reversal of 6646836 is 6386466.

6646836 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6646794 and 6646803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646831) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3706 + ... + 5198.

It is an arithmetic number, because the mean of its divisors is an integer number (376488).

Almost surely, 2^6646836 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 6646836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9035712).

6646836 is an abundant number, since it is smaller than the sum of its proper divisors (11424588).

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

6646836 is a wasteful number, since it uses less digits than its factorization.

6646836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1558 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 6646836 is about 2578.1458453703. The cubic root of 6646836 is about 188.0204067180.

The spelling of 6646836 in words is "six million, six hundred forty-six thousand, eight hundred thirty-six".