68657161 has 2 divisors, whose sum is σ = 68657162. Its totient is φ = 68657160.

The previous prime is 68657159. The next prime is 68657221. The reversal of 68657161 is 16175686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63297936 + 5359225 = 7956^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 68657161 - 2¹ = 68657159 is a prime.

It is a super-3 number, since 3×68657161³ (a number of 24 digits) contains 333 as substring.

Together with 68657159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68657261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34328580 + 34328581.

It is an arithmetic number, because the mean of its divisors is an integer number (34328581).

Almost surely, 2^68657161 is an apocalyptic number.

It is an amenable number.

68657161 is a deficient number, since it is larger than the sum of its proper divisors (1).

68657161 is an equidigital number, since it uses as much as digits as its factorization.

68657161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 68657161 is about 8285.9616822672. The cubic root of 68657161 is about 409.4761523133.

The spelling of 68657161 in words is "sixty-eight million, six hundred fifty-seven thousand, one hundred sixty-one".