6659385457 has 2 divisors, whose sum is σ = 6659385458. Its totient is φ = 6659385456.

The previous prime is 6659385413. The next prime is 6659385479. The reversal of 6659385457 is 7545839566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6462712881 + 196672576 = 80391^2 + 14024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6659385457 is a prime.

It is not a weakly prime, because it can be changed into another prime (6659380457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329692728 + 3329692729.

It is an arithmetic number, because the mean of its divisors is an integer number (3329692729).

Almost surely, 2^6659385457 is an apocalyptic number.

It is an amenable number.

6659385457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6659385457 is an equidigital number, since it uses as much as digits as its factorization.

6659385457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216000, while the sum is 58.

The square root of 6659385457 is about 81605.0577905561. The cubic root of 6659385457 is about 1881.3866200977.

The spelling of 6659385457 in words is "six billion, six hundred fifty-nine million, three hundred eighty-five thousand, four hundred fifty-seven".