6646743 has 12 divisors (see below), whose sum is σ = 9759048. Its totient is φ = 4358160.

The previous prime is 6646699. The next prime is 6646769. The reversal of 6646743 is 3476466.

6646743 is a `hidden beast` number, since 6 + 646 + 7 + 4 + 3 = 666.

It is not a de Polignac number, because 6646743 - 2⁹ = 6646231 is a prime.

6646743 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6646698 and 6646707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5505 + ... + 6602.

It is an arithmetic number, because the mean of its divisors is an integer number (813254).

Almost surely, 2^6646743 is an apocalyptic number.

6646743 is a deficient number, since it is larger than the sum of its proper divisors (3112305).

6646743 is a wasteful number, since it uses less digits than its factorization.

6646743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12174 (or 12171 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 6646743 is about 2578.1278090894. The cubic root of 6646743 is about 188.0195298106.

The spelling of 6646743 in words is "six million, six hundred forty-six thousand, seven hundred forty-three".