166454018 has 4 divisors (see below), whose sum is σ = 249681030. Its totient is φ = 83227008.

The previous prime is 166454011. The next prime is 166454023. The reversal of 166454018 is 810454661.

166454018 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: 810454661 = 1427 ⋅567943.

It can be written as a sum of positive squares in only one way, i.e., 129572689 + 36881329 = 11383^2 + 6073^2 .

It is not an unprimeable number, because it can be changed into a prime (166454011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41613503 + ... + 41613506.

Almost surely, 2^166454018 is an apocalyptic number.

166454018 is a deficient number, since it is larger than the sum of its proper divisors (83227012).

166454018 is an equidigital number, since it uses as much as digits as its factorization.

166454018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83227011.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 166454018 is about 12901.7060112219. The cubic root of 166454018 is about 550.0870583953.

The spelling of 166454018 in words is "one hundred sixty-six million, four hundred fifty-four thousand, eighteen".