668111108 has 12 divisors (see below), whose sum is σ = 1336222272. Its totient is φ = 286333320.

The previous prime is 668111089. The next prime is 668111141. The reversal of 668111108 is 801111866.

668111108 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11930528 + ... + 11930583.

It is an arithmetic number, because the mean of its divisors is an integer number (111351856).

Almost surely, 2^668111108 is an apocalyptic number.

It is an amenable number.

668111108 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

668111108 is a wasteful number, since it uses less digits than its factorization.

668111108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23861122 (or 23861120 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 668111108 is about 25847.8453260615. The cubic root of 668111108 is about 874.2109274877.

The spelling of 668111108 in words is "six hundred sixty-eight million, one hundred eleven thousand, one hundred eight".