68366257 has 2 divisors, whose sum is σ = 68366258. Its totient is φ = 68366256.

The previous prime is 68366227. The next prime is 68366261. The reversal of 68366257 is 75266386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59845696 + 8520561 = 7736^2 + 2919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68366257 is a prime.

It is not a weakly prime, because it can be changed into another prime (68366227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34183128 + 34183129.

It is an arithmetic number, because the mean of its divisors is an integer number (34183129).

Almost surely, 2^68366257 is an apocalyptic number.

It is an amenable number.

68366257 is a deficient number, since it is larger than the sum of its proper divisors (1).

68366257 is an equidigital number, since it uses as much as digits as its factorization.

68366257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 68366257 is about 8268.3890208432. The cubic root of 68366257 is about 408.8970095952.

The spelling of 68366257 in words is "sixty-eight million, three hundred sixty-six thousand, two hundred fifty-seven".