6518664 has 64 divisors (see below), whose sum is σ = 18345600. Its totient is φ = 2144448.

The previous prime is 6518657. The next prime is 6518669. The reversal of 6518664 is 4668156.

6518664 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6518669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22102 + ... + 22394.

It is an arithmetic number, because the mean of its divisors is an integer number (286650).

Almost surely, 2^6518664 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 6518664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9172800).

6518664 is an abundant number, since it is smaller than the sum of its proper divisors (11826936).

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

6518664 is a wasteful number, since it uses less digits than its factorization.

6518664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 401 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 6518664 is about 2553.1674445676. The cubic root of 6518664 is about 186.8040117316.

The spelling of 6518664 in words is "six million, five hundred eighteen thousand, six hundred sixty-four".