6385664 has 26 divisors (see below), whose sum is σ = 12777960. Its totient is φ = 3190784.

The previous prime is 6385619. The next prime is 6385733. The reversal of 6385664 is 4665836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3317 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (491460).

Almost surely, 2^6385664 is an apocalyptic number.

6385664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6385664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6388980).

6385664 is an abundant number, since it is smaller than the sum of its proper divisors (6392296).

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

6385664 is an equidigital number, since it uses as much as digits as its factorization.

6385664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1561 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 6385664 is about 2526.9871388672. The cubic root of 6385664 is about 185.5248209195.

The spelling of 6385664 in words is "six million, three hundred eighty-five thousand, six hundred sixty-four".