165666170 has 16 divisors (see below), whose sum is σ = 307819008. Its totient is φ = 64128720.

The previous prime is 165666161. The next prime is 165666209. The reversal of 165666170 is 71666561.

165666170 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266894 + ... + 267513.

It is an arithmetic number, because the mean of its divisors is an integer number (19238688).

Almost surely, 2^165666170 is an apocalyptic number.

165666170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165666170 is a deficient number, since it is larger than the sum of its proper divisors (142152838).

165666170 is a wasteful number, since it uses less digits than its factorization.

165666170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534445.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 165666170 is about 12871.1370904050. The cubic root of 165666170 is about 549.2178082303.

The spelling of 165666170 in words is "one hundred sixty-five million, six hundred sixty-six thousand, one hundred seventy".