6610644 has 36 divisors (see below), whose sum is σ = 17070144. Its totient is φ = 2156112.

The previous prime is 6610621. The next prime is 6610673. The reversal of 6610644 is 4460166.

6610644 is a `hidden beast` number, since 6 + 6 + 10 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6610644² = 87401228189472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262 + ... + 3645.

Almost surely, 2^6610644 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 6610644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8535072).

6610644 is an abundant number, since it is smaller than the sum of its proper divisors (10459500).

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

6610644 is a wasteful number, since it uses less digits than its factorization.

6610644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964 (or 3959 counting only the distinct ones).

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

The square root of 6610644 is about 2571.1172668706. The cubic root of 6610644 is about 187.6785286262.

The spelling of 6610644 in words is "six million, six hundred ten thousand, six hundred forty-four".