6636841 has 4 divisors (see below), whose sum is σ = 6642000. Its totient is φ = 6631684.

The previous prime is 6636827. The next prime is 6636863. The reversal of 6636841 is 1486366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6636841 - 2⁵ = 6636809 is a prime.

It is a Duffinian number.

6636841 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6636797 and 6636806.

It is not an unprimeable number, because it can be changed into a prime (6634841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (1660500).

Almost surely, 2^6636841 is an apocalyptic number.

It is an amenable number.

6636841 is a deficient number, since it is larger than the sum of its proper divisors (5159).

6636841 is a wasteful number, since it uses less digits than its factorization.

6636841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158.

The product of its digits is 20736, while the sum is 34.

The square root of 6636841 is about 2576.2067075450. The cubic root of 6636841 is about 187.9261159047.

The spelling of 6636841 in words is "six million, six hundred thirty-six thousand, eight hundred forty-one".