6616544 has 24 divisors (see below), whose sum is σ = 14211288. Its totient is φ = 3007360.

The previous prime is 6616543. The next prime is 6616549. The reversal of 6616544 is 4456166.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6616544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9047 + ... + 9750.

It is an arithmetic number, because the mean of its divisors is an integer number (592137).

Almost surely, 2^6616544 is an apocalyptic number.

It is an amenable number.

6616544 is an abundant number, since it is smaller than the sum of its proper divisors (7594744).

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

6616544 is a wasteful number, since it uses less digits than its factorization.

6616544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18818 (or 18810 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 6616544 is about 2572.2643721049. The cubic root of 6616544 is about 187.7343463882.

The spelling of 6616544 in words is "six million, six hundred sixteen thousand, five hundred forty-four".