166005145 has 8 divisors (see below), whose sum is σ = 207867456. Its totient is φ = 127029936.

The previous prime is 166005143. The next prime is 166005179. The reversal of 166005145 is 541500661.

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 166005145 - 2¹ = 166005143 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 721647 + ... + 721876.

It is an arithmetic number, because the mean of its divisors is an integer number (25983432).

Almost surely, 2^166005145 is an apocalyptic number.

It is an amenable number.

166005145 is a deficient number, since it is larger than the sum of its proper divisors (41862311).

166005145 is a wasteful number, since it uses less digits than its factorization.

166005145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443551.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 166005145 is about 12884.2983899008. The cubic root of 166005145 is about 549.5921439074.

The spelling of 166005145 in words is "one hundred sixty-six million, five thousand, one hundred forty-five".