6616720 has 80 divisors (see below), whose sum is σ = 17177472. Its totient is φ = 2350080.

The previous prime is 6616717. The next prime is 6616751. The reversal of 6616720 is 276166.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 64189 + ... + 64291.

Almost surely, 2^6616720 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 6616720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8588736).

6616720 is an abundant number, since it is smaller than the sum of its proper divisors (10560752).

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

6616720 is a wasteful number, since it uses less digits than its factorization.

6616720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 6616720 is about 2572.2985829798. The cubic root of 6616720 is about 187.7360109506.

It can be divided in two parts, 661 and 6720, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6616720 in words is "six million, six hundred sixteen thousand, seven hundred twenty".