171561066 has 16 divisors (see below), whose sum is σ = 345396288. Its totient is φ = 56808000.

The previous prime is 171561043. The next prime is 171561101. The reversal of 171561066 is 660165171.

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 7 ways as a sum of consecutive naturals, for example, 93775 + ... + 95586.

It is an arithmetic number, because the mean of its divisors is an integer number (21587268).

Almost surely, 2^171561066 is an apocalyptic number.

171561066 is an abundant number, since it is smaller than the sum of its proper divisors (173835222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171561066 is a wasteful number, since it uses less digits than its factorization.

171561066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189517.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 171561066 is about 13098.1321569146. The cubic root of 171561066 is about 555.6563033790.

The spelling of 171561066 in words is "one hundred seventy-one million, five hundred sixty-one thousand, sixty-six".