6660444 has 48 divisors (see below), whose sum is σ = 18249728. Its totient is φ = 1850688.

The previous prime is 6660427. The next prime is 6660473. The reversal of 6660444 is 4440666.

It is a congruent number.

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, 2037 + ... + 4179.

Almost surely, 2^6660444 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 6660444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9124864).

6660444 is an abundant number, since it is smaller than the sum of its proper divisors (11589284).

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

6660444 is a wasteful number, since it uses less digits than its factorization.

6660444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 6660444 is about 2580.7836019318. The cubic root of 6660444 is about 188.1486300123.

The spelling of 6660444 in words is "six million, six hundred sixty thousand, four hundred forty-four".