6655680457 has 2 divisors, whose sum is σ = 6655680458. Its totient is φ = 6655680456.

The previous prime is 6655680359. The next prime is 6655680461. The reversal of 6655680457 is 7540865566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5158686976 + 1496993481 = 71824^2 + 38691^2 .

It is a cyclic number.

It is not a de Polignac number, because 6655680457 - 2¹¹ = 6655678409 is a prime.

It is not a weakly prime, because it can be changed into another prime (6655680497) 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, 3327840228 + 3327840229.

It is an arithmetic number, because the mean of its divisors is an integer number (3327840229).

Almost surely, 2^6655680457 is an apocalyptic number.

It is an amenable number.

6655680457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655680457 is an equidigital number, since it uses as much as digits as its factorization.

6655680457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The square root of 6655680457 is about 81582.3538334118. The cubic root of 6655680457 is about 1881.0376474296.

The spelling of 6655680457 in words is "six billion, six hundred fifty-five million, six hundred eighty thousand, four hundred fifty-seven".