6640883 has 4 divisors (see below), whose sum is σ = 6731928. Its totient is φ = 6549840.

The previous prime is 6640849. The next prime is 6640889. The reversal of 6640883 is 3880466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3880466 = 2 ⋅1940233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6640883 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640889) 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, 45413 + ... + 45558.

It is an arithmetic number, because the mean of its divisors is an integer number (1682982).

Almost surely, 2^6640883 is an apocalyptic number.

6640883 is a deficient number, since it is larger than the sum of its proper divisors (91045).

6640883 is an equidigital number, since it uses as much as digits as its factorization.

6640883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91044.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 6640883 is about 2576.9910748778. The cubic root of 6640883 is about 187.9642587103.

The spelling of 6640883 in words is "six million, six hundred forty thousand, eight hundred eighty-three".