166206603143 has 4 divisors (see below), whose sum is σ = 189950403600. Its totient is φ = 142462802688.

The previous prime is 166206603113. The next prime is 166206603169. The reversal of 166206603143 is 341306602661.

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 166206603143 - 2³⁰ = 165132861319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166206603097 and 166206603106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166206603113) 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, 11871900218 + ... + 11871900231.

It is an arithmetic number, because the mean of its divisors is an integer number (47487600900).

Almost surely, 2^166206603143 is an apocalyptic number.

166206603143 is a deficient number, since it is larger than the sum of its proper divisors (23743800457).

166206603143 is an equidigital number, since it uses as much as digits as its factorization.

166206603143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23743800456.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 166206603143 in words is "one hundred sixty-six billion, two hundred six million, six hundred three thousand, one hundred forty-three".