6640592993 has 2 divisors, whose sum is σ = 6640592994. Its totient is φ = 6640592992.

The previous prime is 6640592969. The next prime is 6640592999. The reversal of 6640592993 is 3992950466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4102146304 + 2538446689 = 64048^2 + 50383^2 .

It is a cyclic number.

It is not a de Polignac number, because 6640592993 - 2¹² = 6640588897 is a prime.

It is not a weakly prime, because it can be changed into another prime (6640592999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320296496 + 3320296497.

It is an arithmetic number, because the mean of its divisors is an integer number (3320296497).

Almost surely, 2^6640592993 is an apocalyptic number.

It is an amenable number.

6640592993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640592993 is an equidigital number, since it uses as much as digits as its factorization.

6640592993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3149280, while the sum is 53.

The square root of 6640592993 is about 81489.8336788093. The cubic root of 6640592993 is about 1879.6152254080.

The spelling of 6640592993 in words is "six billion, six hundred forty million, five hundred ninety-two thousand, nine hundred ninety-three".