6395664 has 40 divisors (see below), whose sum is σ = 18025632. Its totient is φ = 1937920.

The previous prime is 6395663. The next prime is 6395671. The reversal of 6395664 is 4665936.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6395663) 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, 5529 + ... + 6584.

Almost surely, 2^6395664 is an apocalyptic number.

It is an amenable number.

6395664 is an abundant number, since it is smaller than the sum of its proper divisors (11629968).

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

6395664 is a wasteful number, since it uses less digits than its factorization.

6395664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12135 (or 12129 counting only the distinct ones).

The product of its digits is 116640, while the sum is 39.

The square root of 6395664 is about 2528.9650056891. The cubic root of 6395664 is about 185.6216148528.

The spelling of 6395664 in words is "six million, three hundred ninety-five thousand, six hundred sixty-four".