668107185 has 16 divisors (see below), whose sum is σ = 1070553024. Its totient is φ = 355796672.

The previous prime is 668107163. The next prime is 668107267. The reversal of 668107185 is 581701866.

It is a cyclic number.

It is not a de Polignac number, because 668107185 - 2¹⁰ = 668106161 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22362 + ... + 42851.

It is an arithmetic number, because the mean of its divisors is an integer number (66909564).

Almost surely, 2^668107185 is an apocalyptic number.

It is an amenable number.

668107185 is a deficient number, since it is larger than the sum of its proper divisors (402445839).

668107185 is a wasteful number, since it uses less digits than its factorization.

668107185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65904.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 668107185 is about 25847.7694395474. The cubic root of 668107185 is about 874.2092164269.

The spelling of 668107185 in words is "six hundred sixty-eight million, one hundred seven thousand, one hundred eighty-five".