6544664 has 32 divisors (see below), whose sum is σ = 14764800. Its totient is φ = 2656800.

The previous prime is 6544663. The next prime is 6544667. The reversal of 6544664 is 4664456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2012 + ... + 4139.

It is an arithmetic number, because the mean of its divisors is an integer number (461400).

Almost surely, 2^6544664 is an apocalyptic number.

It is an amenable number.

6544664 is an abundant number, since it is smaller than the sum of its proper divisors (8220136).

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

6544664 is a wasteful number, since it uses less digits than its factorization.

6544664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6183 (or 6179 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 6544664 is about 2558.2540921496. The cubic root of 6544664 is about 187.0520411461.

The spelling of 6544664 in words is "six million, five hundred forty-four thousand, six hundred sixty-four".