6644016 has 120 divisors (see below), whose sum is σ = 20214480. Its totient is φ = 2032128.

The previous prime is 6643999. The next prime is 6644023. The reversal of 6644016 is 6104466.

6644016 is a `hidden beast` number, since 6 + 644 + 0 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154491 + ... + 154533.

It is an arithmetic number, because the mean of its divisors is an integer number (168454).

Almost surely, 2^6644016 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 6644016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10107240).

6644016 is an abundant number, since it is smaller than the sum of its proper divisors (13570464).

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

6644016 is a wasteful number, since it uses less digits than its factorization.

6644016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6644016 is about 2577.5988826813. The cubic root of 6644016 is about 187.9938129849.

The spelling of 6644016 in words is "six million, six hundred forty-four thousand, sixteen".