6720416 has 36 divisors (see below), whose sum is σ = 13865922. Its totient is φ = 3206016.

The previous prime is 6720409. The next prime is 6720437. The reversal of 6720416 is 6140276.

It can be written as a sum of positive squares in only one way, i.e., 5290000 + 1430416 = 2300^2 + 1196^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16730 + ... + 17126.

Almost surely, 2^6720416 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 6720416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6932961).

6720416 is an abundant number, since it is smaller than the sum of its proper divisors (7145506).

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

6720416 is a wasteful number, since it uses less digits than its factorization.

6720416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 6720416 is about 2592.3765158634. The cubic root of 6720416 is about 188.7116531019.

The spelling of 6720416 in words is "six million, seven hundred twenty thousand, four hundred sixteen".