6615335641 has 2 divisors, whose sum is σ = 6615335642. Its totient is φ = 6615335640.

The previous prime is 6615335591. The next prime is 6615335653. The reversal of 6615335641 is 1465335166.

6615335641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6610340416 + 4995225 = 81304^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 6615335641 - 2⁷ = 6615335513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6615335594 and 6615335603.

It is not a weakly prime, because it can be changed into another prime (6615338641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307667820 + 3307667821.

It is an arithmetic number, because the mean of its divisors is an integer number (3307667821).

Almost surely, 2^6615335641 is an apocalyptic number.

It is an amenable number.

6615335641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615335641 is an equidigital number, since it uses as much as digits as its factorization.

6615335641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 40.

The square root of 6615335641 is about 81334.7136283149. The cubic root of 6615335641 is about 1877.2291724438.

The spelling of 6615335641 in words is "six billion, six hundred fifteen million, three hundred thirty-five thousand, six hundred forty-one".