6209664 has 64 divisors (see below), whose sum is σ = 16760640. Its totient is φ = 2036736.

The previous prime is 6209663. The next prime is 6209669. The reversal of 6209664 is 4669026.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6209663) 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, 39474 + ... + 39630.

It is an arithmetic number, because the mean of its divisors is an integer number (261885).

Almost surely, 2^6209664 is an apocalyptic number.

6209664 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 6209664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8380320).

6209664 is an abundant number, since it is smaller than the sum of its proper divisors (10550976).

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

6209664 is a wasteful number, since it uses less digits than its factorization.

With its successor (6209665) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (277).

6209664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6209664 is about 2491.9197418858. The cubic root of 6209664 is about 183.8044551455.

The spelling of 6209664 in words is "six million, two hundred nine thousand, six hundred sixty-four".