6609920 has 44 divisors (see below), whose sum is σ = 15868344. Its totient is φ = 2641920.

The previous prime is 6609893. The next prime is 6609971. The reversal of 6609920 is 299066.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4475 + ... + 5765.

Almost surely, 2^6609920 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 6609920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7934172).

6609920 is an abundant number, since it is smaller than the sum of its proper divisors (9258424).

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

6609920 is a wasteful number, since it uses less digits than its factorization.

6609920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 6609920 is about 2570.9764681926. The cubic root of 6609920 is about 187.6716768371.

The spelling of 6609920 in words is "six million, six hundred nine thousand, nine hundred twenty".