67105805988 has 24 divisors (see below), whose sum is σ = 168624846208. Its totient is φ = 20647940256.

The previous prime is 67105805981. The next prime is 67105806007. The reversal of 67105805988 is 88950850176.

It is a happy number.

It is a super-2 number, since 2×67105805988² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67105805981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215082556 + ... + 215082867.

Almost surely, 2^67105805988 is an apocalyptic number.

It is an amenable number.

67105805988 is an abundant number, since it is smaller than the sum of its proper divisors (101519040220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67105805988 is a wasteful number, since it uses less digits than its factorization.

67105805988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430165443 (or 430165441 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 57.

The spelling of 67105805988 in words is "sixty-seven billion, one hundred five million, eight hundred five thousand, nine hundred eighty-eight".