665168075068 has 24 divisors (see below), whose sum is σ = 1330702736384. Its totient is φ = 284993478000.

The previous prime is 665168075041. The next prime is 665168075087. The reversal of 665168075068 is 860570861566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3169608 + ... + 3372943.

Almost surely, 2^665168075068 is an apocalyptic number.

It is an amenable number.

665168075068 is an abundant number, since it is smaller than the sum of its proper divisors (665534661316).

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

665168075068 is a wasteful number, since it uses less digits than its factorization.

665168075068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6546193 (or 6546191 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 58.

The spelling of 665168075068 in words is "six hundred sixty-five billion, one hundred sixty-eight million, seventy-five thousand, sixty-eight".