6647044547 has 8 divisors (see below), whose sum is σ = 7809115440. Its totient is φ = 5577939360.

The previous prime is 6647044541. The next prime is 6647044549. The reversal of 6647044547 is 7454407466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6647044547 - 2⁶ = 6647044483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6647044541) 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, 23241272 + ... + 23241557.

It is an arithmetic number, because the mean of its divisors is an integer number (976139430).

Almost surely, 2^6647044547 is an apocalyptic number.

6647044547 is a deficient number, since it is larger than the sum of its proper divisors (1162070893).

6647044547 is a wasteful number, since it uses less digits than its factorization.

6647044547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46482853.

The product of its (nonzero) digits is 2257920, while the sum is 47.

The square root of 6647044547 is about 81529.4090926704. The cubic root of 6647044547 is about 1880.2237310128.

The spelling of 6647044547 in words is "six billion, six hundred forty-seven million, forty-four thousand, five hundred forty-seven".