67798890017 has 4 divisors (see below), whose sum is σ = 71787060036. Its totient is φ = 63810720000.

The previous prime is 67798890007. The next prime is 67798890041. The reversal of 67798890017 is 71009889776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37366436416 + 30432453601 = 193304^2 + 174449^2 .

It is a cyclic number.

It is not a de Polignac number, because 67798890017 - 2²² = 67794695713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67798890007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1994084984 + ... + 1994085017.

It is an arithmetic number, because the mean of its divisors is an integer number (17946765009).

Almost surely, 2^67798890017 is an apocalyptic number.

It is an amenable number.

67798890017 is a deficient number, since it is larger than the sum of its proper divisors (3988170019).

67798890017 is a wasteful number, since it uses less digits than its factorization.

67798890017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988170018.

The product of its (nonzero) digits is 10668672, while the sum is 62.

The spelling of 67798890017 in words is "sixty-seven billion, seven hundred ninety-eight million, eight hundred ninety thousand, seventeen".