166343018 has 4 divisors (see below), whose sum is σ = 249514530. Its totient is φ = 83171508.

The previous prime is 166343017. The next prime is 166343041. The reversal of 166343018 is 810343661.

166343018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810343661 = 71 ⋅11413291.

It can be written as a sum of positive squares in only one way, i.e., 166229449 + 113569 = 12893^2 + 337^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166343017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41585753 + ... + 41585756.

Almost surely, 2^166343018 is an apocalyptic number.

166343018 is a deficient number, since it is larger than the sum of its proper divisors (83171512).

166343018 is an equidigital number, since it uses as much as digits as its factorization.

166343018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83171511.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 166343018 is about 12897.4035371465. The cubic root of 166343018 is about 549.9647558683.

Adding to 166343018 its reverse (810343661), we get a palindrome (976686679).

The spelling of 166343018 in words is "one hundred sixty-six million, three hundred forty-three thousand, eighteen".