6647472 has 120 divisors (see below), whose sum is σ = 20717424. Its totient is φ = 1976832.

The previous prime is 6647447. The next prime is 6647489. The reversal of 6647472 is 2747466.

6647472 is a `hidden beast` number, since 6 + 647 + 4 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (56448) is a multiple of the sum of its prime factors (147).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99183 + ... + 99249.

Almost surely, 2^6647472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6647472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10358712).

6647472 is an abundant number, since it is smaller than the sum of its proper divisors (14069952).

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

6647472 is a wasteful number, since it uses less digits than its factorization.

6647472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 138 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 6647472 is about 2578.2691868771. The cubic root of 6647472 is about 188.0264034140.

The spelling of 6647472 in words is "six million, six hundred forty-seven thousand, four hundred seventy-two".