6720636 has 48 divisors (see below), whose sum is σ = 17166464. Its totient is φ = 2033856.

The previous prime is 6720629. The next prime is 6720667. The reversal of 6720636 is 6360276.

6720636 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10131 + ... + 10773.

Almost surely, 2^6720636 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 6720636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8583232).

6720636 is an abundant number, since it is smaller than the sum of its proper divisors (10445828).

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

6720636 is a wasteful number, since it uses less digits than its factorization.

6720636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 6720636 is about 2592.4189476240. The cubic root of 6720636 is about 188.7137123054.

The spelling of 6720636 in words is "six million, seven hundred twenty thousand, six hundred thirty-six".