166506143 has 8 divisors (see below), whose sum is σ = 176414112. Its totient is φ = 156610816.

The previous prime is 166506127. The next prime is 166506169. The reversal of 166506143 is 341605661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166506143 - 2⁴ = 166506127 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 (166506113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45446 + ... + 48972.

It is an arithmetic number, because the mean of its divisors is an integer number (22051764).

Almost surely, 2^166506143 is an apocalyptic number.

166506143 is a deficient number, since it is larger than the sum of its proper divisors (9907969).

166506143 is a wasteful number, since it uses less digits than its factorization.

166506143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 166506143 is about 12903.7259347833. The cubic root of 166506143 is about 550.1444722400.

The spelling of 166506143 in words is "one hundred sixty-six million, five hundred six thousand, one hundred forty-three".