168665018 has 8 divisors (see below), whose sum is σ = 259835412. Its totient is φ = 82053216.

The previous prime is 168664997. The next prime is 168665039. The reversal of 168665018 is 810566861.

It is a happy number.

168665018 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (168664997) and next prime (168665039).

It can be written as a sum of positive squares in 2 ways, for example, as 164531929 + 4133089 = 12827^2 + 2033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1139555 + ... + 1139702.

Almost surely, 2^168665018 is an apocalyptic number.

168665018 is a deficient number, since it is larger than the sum of its proper divisors (91170394).

168665018 is a wasteful number, since it uses less digits than its factorization.

168665018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279296.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 168665018 is about 12987.1096861465. The cubic root of 168665018 is about 552.5119458526.

The spelling of 168665018 in words is "one hundred sixty-eight million, six hundred sixty-five thousand, eighteen".