6646845 has 8 divisors (see below), whose sum is σ = 10634976. Its totient is φ = 3544976.

The previous prime is 6646837. The next prime is 6646859. The reversal of 6646845 is 5486466.

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 6646845 - 2³ = 6646837 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 221547 + ... + 221576.

It is an arithmetic number, because the mean of its divisors is an integer number (1329372).

Almost surely, 2^6646845 is an apocalyptic number.

It is an amenable number.

6646845 is a deficient number, since it is larger than the sum of its proper divisors (3988131).

6646845 is a wasteful number, since it uses less digits than its factorization.

6646845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443131.

The product of its digits is 138240, while the sum is 39.

The square root of 6646845 is about 2578.1475908101. The cubic root of 6646845 is about 188.0204915796.

The spelling of 6646845 in words is "six million, six hundred forty-six thousand, eight hundred forty-five".