6647424 has 64 divisors (see below), whose sum is σ = 20187840. Its totient is φ = 1898496.

The previous prime is 6647411. The next prime is 6647447. The reversal of 6647424 is 4247466.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1452 + ... + 3924.

It is an arithmetic number, because the mean of its divisors is an integer number (315435).

Almost surely, 2^6647424 is an apocalyptic number.

6647424 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 6647424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10093920).

6647424 is an abundant number, since it is smaller than the sum of its proper divisors (13540416).

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

6647424 is a wasteful number, since it uses less digits than its factorization.

6647424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497 (or 2485 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 6647424 is about 2578.2598782900. The cubic root of 6647424 is about 188.0259508465.

The spelling of 6647424 in words is "six million, six hundred forty-seven thousand, four hundred twenty-four".