6661044 has 72 divisors (see below), whose sum is σ = 18610592. Its totient is φ = 1995840.

The previous prime is 6661037. The next prime is 6661049. The reversal of 6661044 is 4401666.

It is a junction number, because it is equal to n+sod(n) for n = 6660999 and 6661017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19959 + ... + 20289.

Almost surely, 2^6661044 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 6661044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9305296).

6661044 is an abundant number, since it is smaller than the sum of its proper divisors (11949548).

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

6661044 is a wasteful number, since it uses less digits than its factorization.

6661044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 392 counting only the distinct ones).

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

The square root of 6661044 is about 2580.8998430780. The cubic root of 6661044 is about 188.1542795750.

The spelling of 6661044 in words is "six million, six hundred sixty-one thousand, forty-four".