6640936903 has 2 divisors, whose sum is σ = 6640936904. Its totient is φ = 6640936902.

The previous prime is 6640936853. The next prime is 6640936909. The reversal of 6640936903 is 3096390466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6640936903 - 2⁹ = 6640936391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6640936909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320468451 + 3320468452.

It is an arithmetic number, because the mean of its divisors is an integer number (3320468452).

Almost surely, 2^6640936903 is an apocalyptic number.

6640936903 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640936903 is an equidigital number, since it uses as much as digits as its factorization.

6640936903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 46.

The square root of 6640936903 is about 81491.9437920093. The cubic root of 6640936903 is about 1879.6476726766.

The spelling of 6640936903 in words is "six billion, six hundred forty million, nine hundred thirty-six thousand, nine hundred three".