166842443 has 4 divisors (see below), whose sum is σ = 166896288. Its totient is φ = 166788600.

The previous prime is 166842421. The next prime is 166842457. The reversal of 166842443 is 344248661.

166842443 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.

It is a cyclic number.

It is not a de Polignac number, because 166842443 - 2⁸ = 166842187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166842397 and 166842406.

It is not an unprimeable number, because it can be changed into a prime (166842493) 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, 21971 + ... + 28572.

It is an arithmetic number, because the mean of its divisors is an integer number (41724072).

Almost surely, 2^166842443 is an apocalyptic number.

166842443 is a deficient number, since it is larger than the sum of its proper divisors (53845).

166842443 is an equidigital number, since it uses as much as digits as its factorization.

166842443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53844.

The product of its digits is 110592, while the sum is 38.

The square root of 166842443 is about 12916.7504814485. The cubic root of 166842443 is about 550.5146070634.

The spelling of 166842443 in words is "one hundred sixty-six million, eight hundred forty-two thousand, four hundred forty-three".