166443053 has 12 divisors (see below), whose sum is σ = 193854492. Its totient is φ = 142490880.

The previous prime is 166443047. The next prime is 166443077. The reversal of 166443053 is 350344661.

It can be written as a sum of positive squares in 2 ways, for example, as 88774084 + 77668969 = 9422^2 + 8813^2 .

It is not a de Polignac number, because 166443053 - 2⁴ = 166443037 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166443653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53213 + ... + 56253.

It is an arithmetic number, because the mean of its divisors is an integer number (16154541).

Almost surely, 2^166443053 is an apocalyptic number.

It is an amenable number.

166443053 is a deficient number, since it is larger than the sum of its proper divisors (27411439).

166443053 is a wasteful number, since it uses less digits than its factorization.

166443053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172 (or 4165 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 166443053 is about 12901.2810604219. The cubic root of 166443053 is about 550.0749793096.

The spelling of 166443053 in words is "one hundred sixty-six million, four hundred forty-three thousand, fifty-three".