166011143 has 4 divisors (see below), whose sum is σ = 166036920. Its totient is φ = 165985368.

The previous prime is 166011133. The next prime is 166011203. The reversal of 166011143 is 341110661.

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 166011143 - 2⁴ = 166011127 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 (166011133) 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, 5996 + ... + 19182.

It is an arithmetic number, because the mean of its divisors is an integer number (41509230).

Almost surely, 2^166011143 is an apocalyptic number.

166011143 is a deficient number, since it is larger than the sum of its proper divisors (25777).

166011143 is a wasteful number, since it uses less digits than its factorization.

166011143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25776.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 166011143 is about 12884.5311517338. The cubic root of 166011143 is about 549.5987630074.

The spelling of 166011143 in words is "one hundred sixty-six million, eleven thousand, one hundred forty-three".