165706 has 8 divisors (see below), whose sum is σ = 257220. Its totient is φ = 79968.

The previous prime is 165703. The next prime is 165707. The reversal of 165706 is 607561.

165706 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 2 ways, for example, as 164025 + 1681 = 405^2 + 41^2 .

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

It is not an unprimeable number, because it can be changed into a prime (165701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371 + ... + 1486.

2¹⁶⁵⁷⁰⁶ is an apocalyptic number.

165706 is a deficient number, since it is larger than the sum of its proper divisors (91514).

165706 is a wasteful number, since it uses less digits than its factorization.

165706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 165706 is about 407.0700185472. The cubic root of 165706 is about 54.9261819615.

The spelling of 165706 in words is "one hundred sixty-five thousand, seven hundred six".