166541572 has 12 divisors (see below), whose sum is σ = 291540816. Its totient is φ = 83244200.

The previous prime is 166541569. The next prime is 166541581. The reversal of 166541572 is 275145661.

It is a happy number.

It is an unprimeable number.

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, 16083 + ... + 24325.

It is an arithmetic number, because the mean of its divisors is an integer number (24295068).

Almost surely, 2^166541572 is an apocalyptic number.

It is an amenable number.

166541572 is a deficient number, since it is larger than the sum of its proper divisors (124999244).

166541572 is a wasteful number, since it uses less digits than its factorization.

166541572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13298 (or 13296 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 166541572 is about 12905.0986823038. The cubic root of 166541572 is about 550.1834891914.

The spelling of 166541572 in words is "one hundred sixty-six million, five hundred forty-one thousand, five hundred seventy-two".