6656472 has 32 divisors (see below), whose sum is σ = 18490800. Its totient is φ = 2218752.

The previous prime is 6656471. The next prime is 6656483. The reversal of 6656472 is 2746566.

6656472 is a `hidden beast` number, since 6 + 6 + 5 + 647 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15193 + ... + 15624.

Almost surely, 2^6656472 is an apocalyptic number.

It is an amenable number.

6656472 is an abundant number, since it is smaller than the sum of its proper divisors (11834328).

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

6656472 is a wasteful number, since it uses less digits than its factorization.

6656472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30832 (or 30822 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 6656472 is about 2580.0139534506. The cubic root of 6656472 is about 188.1112213467. Note that the first 3 decimals are identical.

The spelling of 6656472 in words is "six million, six hundred fifty-six thousand, four hundred seventy-two".