6606643 has 4 divisors (see below), whose sum is σ = 6718680. Its totient is φ = 6494608.

The previous prime is 6606641. The next prime is 6606647. The reversal of 6606643 is 3466066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3466066 = 2 ⋅1733033.

It is a cyclic number.

It is not a de Polignac number, because 6606643 - 2¹ = 6606641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6606641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55930 + ... + 56047.

It is an arithmetic number, because the mean of its divisors is an integer number (1679670).

Almost surely, 2^6606643 is an apocalyptic number.

6606643 is a deficient number, since it is larger than the sum of its proper divisors (112037).

6606643 is a wasteful number, since it uses less digits than its factorization.

6606643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112036.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 6606643 is about 2570.3390826893. The cubic root of 6606643 is about 187.6406577150.

The spelling of 6606643 in words is "six million, six hundred six thousand, six hundred forty-three".