165870667 has 8 divisors (see below), whose sum is σ = 170580176. Its totient is φ = 161173152.

The previous prime is 165870643. The next prime is 165870709. The reversal of 165870667 is 766078561.

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

It is a cyclic number.

It is not a de Polignac number, because 165870667 - 2¹⁵ = 165837899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165870637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30133 + ... + 35209.

It is an arithmetic number, because the mean of its divisors is an integer number (21322522).

Almost surely, 2^165870667 is an apocalyptic number.

165870667 is a deficient number, since it is larger than the sum of its proper divisors (4709509).

165870667 is an equidigital number, since it uses as much as digits as its factorization.

165870667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5997.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 165870667 is about 12879.0786549349. The cubic root of 165870667 is about 549.4436986719.

The spelling of 165870667 in words is "one hundred sixty-five million, eight hundred seventy thousand, six hundred sixty-seven".