165571166 has 8 divisors (see below), whose sum is σ = 248447640. Its totient is φ = 82755288.

The previous prime is 165571151. The next prime is 165571183. The reversal of 165571166 is 661175561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×165571166² = 54827622021199112, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7556 + ... + 19703.

It is an arithmetic number, because the mean of its divisors is an integer number (31055955).

Almost surely, 2^165571166 is an apocalyptic number.

165571166 is a deficient number, since it is larger than the sum of its proper divisors (82876474).

165571166 is a wasteful number, since it uses less digits than its factorization.

165571166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30298.

The product of its digits is 37800, while the sum is 38.

The square root of 165571166 is about 12867.4459781264. The cubic root of 165571166 is about 549.1128021491.

The spelling of 165571166 in words is "one hundred sixty-five million, five hundred seventy-one thousand, one hundred sixty-six".