68663172 has 12 divisors (see below), whose sum is σ = 160214096. Its totient is φ = 22887720.

The previous prime is 68663137. The next prime is 68663191. The reversal of 68663172 is 27136686.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 68663172.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2860954 + ... + 2860977.

Almost surely, 2^68663172 is an apocalyptic number.

It is an amenable number.

68663172 is an abundant number, since it is smaller than the sum of its proper divisors (91550924).

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

68663172 is a wasteful number, since it uses less digits than its factorization.

68663172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721938 (or 5721936 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 68663172 is about 8286.3243962568. The cubic root of 68663172 is about 409.4881019739.

The spelling of 68663172 in words is "sixty-eight million, six hundred sixty-three thousand, one hundred seventy-two".