165670 has 8 divisors (see below), whose sum is σ = 298224. Its totient is φ = 66264.

The previous prime is 165667. The next prime is 165673. The reversal of 165670 is 76561.

It is an interprime number because it is at equal distance from previous prime (165667) and next prime (165673).

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165673) 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, 8274 + ... + 8293.

It is an arithmetic number, because the mean of its divisors is an integer number (37278).

2¹⁶⁵⁶⁷⁰ is an apocalyptic number.

165670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165670 is a deficient number, since it is larger than the sum of its proper divisors (132554).

165670 is a wasteful number, since it uses less digits than its factorization.

165670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16574.

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

The square root of 165670 is about 407.0257977082. The cubic root of 165670 is about 54.9222040613.

The spelling of 165670 in words is "one hundred sixty-five thousand, six hundred seventy".