6515664 has 20 divisors (see below), whose sum is σ = 16832256. Its totient is φ = 2171872.

The previous prime is 6515659. The next prime is 6515669. The reversal of 6515664 is 4665156.

6515664 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6515659) and next prime (6515669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6515669) 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, 67824 + ... + 67919.

Almost surely, 2^6515664 is an apocalyptic number.

It is an amenable number.

6515664 is an abundant number, since it is smaller than the sum of its proper divisors (10316592).

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

6515664 is a wasteful number, since it uses less digits than its factorization.

6515664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135754 (or 135748 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 6515664 is about 2552.5798714242. The cubic root of 6515664 is about 186.7753505404.

The spelling of 6515664 in words is "six million, five hundred fifteen thousand, six hundred sixty-four".