166442063 has 4 divisors (see below), whose sum is σ = 166468200. Its totient is φ = 166415928.

The previous prime is 166442051. The next prime is 166442113. The reversal of 166442063 is 360244661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 166442063 - 2⁶ = 166441999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166442863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3413 + ... + 18561.

It is an arithmetic number, because the mean of its divisors is an integer number (41617050).

Almost surely, 2^166442063 is an apocalyptic number.

166442063 is a deficient number, since it is larger than the sum of its proper divisors (26137).

166442063 is a wasteful number, since it uses less digits than its factorization.

166442063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26136.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 166442063 is about 12901.2426920820. The cubic root of 166442063 is about 550.0738886957.

The spelling of 166442063 in words is "one hundred sixty-six million, four hundred forty-two thousand, sixty-three".