6636641 has 8 divisors (see below), whose sum is σ = 7322400. Its totient is φ = 5964640.

The previous prime is 6636611. The next prime is 6636661. The reversal of 6636641 is 1466366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6636641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6636598 and 6636607.

It is not an unprimeable number, because it can be changed into a prime (6636611) 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, 2411 + ... + 4368.

It is an arithmetic number, because the mean of its divisors is an integer number (915300).

Almost surely, 2^6636641 is an apocalyptic number.

It is an amenable number.

6636641 is a deficient number, since it is larger than the sum of its proper divisors (685759).

6636641 is a wasteful number, since it uses less digits than its factorization.

6636641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879.

The product of its digits is 15552, while the sum is 32.

The square root of 6636641 is about 2576.1678904916. The cubic root of 6636641 is about 187.9242281793.

The spelling of 6636641 in words is "six million, six hundred thirty-six thousand, six hundred forty-one".