67986806258 has 18 divisors (see below), whose sum is σ = 118634543631. Its totient is φ = 29136096444.

The previous prime is 67986806243. The next prime is 67986806263. The reversal of 67986806258 is 85260868976.

It can be written as a sum of positive squares in only one way, i.e., 33993403129 + 33993403129 = 184373^2 + 184373^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=184373.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67986806194 and 67986806203.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2568053 + ... + 2594391.

Almost surely, 2^67986806258 is an apocalyptic number.

67986806258 is a deficient number, since it is larger than the sum of its proper divisors (50647737373).

67986806258 is an frugal number, since it uses more digits than its factorization.

67986806258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52694 (or 26348 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 67986806258 in words is "sixty-seven billion, nine hundred eighty-six million, eight hundred six thousand, two hundred fifty-eight".