166018193 has 4 divisors (see below), whose sum is σ = 181110768. Its totient is φ = 150925620.

The previous prime is 166018169. The next prime is 166018201. The reversal of 166018193 is 391810661.

166018193 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166018193 - 2⁶ = 166018129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166012193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7546271 + ... + 7546292.

It is an arithmetic number, because the mean of its divisors is an integer number (45277692).

Almost surely, 2^166018193 is an apocalyptic number.

It is an amenable number.

166018193 is a deficient number, since it is larger than the sum of its proper divisors (15092575).

166018193 is a wasteful number, since it uses less digits than its factorization.

166018193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15092574.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 166018193 is about 12884.8047327074. The cubic root of 166018193 is about 549.6065428395.

The spelling of 166018193 in words is "one hundred sixty-six million, eighteen thousand, one hundred ninety-three".