657345068741 has 2 divisors, whose sum is σ = 657345068742. Its totient is φ = 657345068740.

The previous prime is 657345068707. The next prime is 657345068749. The reversal of 657345068741 is 147860543756.

It is a happy number.

657345068741 is digitally balanced in base 2, 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., 451242688516 + 206102380225 = 671746^2 + 453985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657345068741 is a prime.

It is a super-2 number, since 2×657345068741² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (657345068749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328672534370 + 328672534371.

It is an arithmetic number, because the mean of its divisors is an integer number (328672534371).

Almost surely, 2^657345068741 is an apocalyptic number.

It is an amenable number.

657345068741 is a deficient number, since it is larger than the sum of its proper divisors (1).

657345068741 is an equidigital number, since it uses as much as digits as its factorization.

657345068741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16934400, while the sum is 56.

The spelling of 657345068741 in words is "six hundred fifty-seven billion, three hundred forty-five million, sixty-eight thousand, seven hundred forty-one".