166005141 has 4 divisors (see below), whose sum is σ = 221340192. Its totient is φ = 110670092.

The previous prime is 166005131. The next prime is 166005143. The reversal of 166005141 is 141500661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 141500661 = 3 ⋅47166887.

It is a cyclic number.

It is not a de Polignac number, because 166005141 - 2¹¹ = 166003093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166005143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27667521 + ... + 27667526.

It is an arithmetic number, because the mean of its divisors is an integer number (55335048).

Almost surely, 2^166005141 is an apocalyptic number.

It is an amenable number.

166005141 is a deficient number, since it is larger than the sum of its proper divisors (55335051).

166005141 is an equidigital number, since it uses as much as digits as its factorization.

166005141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55335050.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 166005141 is about 12884.2982346731. The cubic root of 166005141 is about 549.5921394931.

The spelling of 166005141 in words is "one hundred sixty-six million, five thousand, one hundred forty-one".