6663847 has 8 divisors (see below), whose sum is σ = 7156512. Its totient is φ = 6182400.

The previous prime is 6663841. The next prime is 6663857. The reversal of 6663847 is 7483666.

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 6663847 - 2¹⁹ = 6139559 is a prime.

It is a Duffinian number.

6663847 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663841) 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, 1554 + ... + 3967.

It is an arithmetic number, because the mean of its divisors is an integer number (894564).

Almost surely, 2^6663847 is an apocalyptic number.

6663847 is a deficient number, since it is larger than the sum of its proper divisors (492665).

6663847 is a wasteful number, since it uses less digits than its factorization.

6663847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609.

The product of its digits is 145152, while the sum is 40.

The square root of 6663847 is about 2581.4428136219. The cubic root of 6663847 is about 188.1806679552.

The spelling of 6663847 in words is "six million, six hundred sixty-three thousand, eight hundred forty-seven".