67968158917 has 2 divisors, whose sum is σ = 67968158918. Its totient is φ = 67968158916.

The previous prime is 67968158891. The next prime is 67968158939. The reversal of 67968158917 is 71985186976.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38133887841 + 29834271076 = 195279^2 + 172726^2 .

It is a cyclic number.

It is not a de Polignac number, because 67968158917 - 2⁷ = 67968158789 is a prime.

It is a super-2 number, since 2×67968158917² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67968158957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33984079458 + 33984079459.

It is an arithmetic number, because the mean of its divisors is an integer number (33984079459).

Almost surely, 2^67968158917 is an apocalyptic number.

It is an amenable number.

67968158917 is a deficient number, since it is larger than the sum of its proper divisors (1).

67968158917 is an equidigital number, since it uses as much as digits as its factorization.

67968158917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 67.

The spelling of 67968158917 in words is "sixty-seven billion, nine hundred sixty-eight million, one hundred fifty-eight thousand, nine hundred seventeen".