165441667 has 4 divisors (see below), whose sum is σ = 165518640. Its totient is φ = 165364696.

The previous prime is 165441643. The next prime is 165441677. The reversal of 165441667 is 766144561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165441667 - 2²⁷ = 31223939 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165441677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35167 + ... + 39592.

It is an arithmetic number, because the mean of its divisors is an integer number (41379660).

Almost surely, 2^165441667 is an apocalyptic number.

165441667 is a deficient number, since it is larger than the sum of its proper divisors (76973).

165441667 is an equidigital number, since it uses as much as digits as its factorization.

165441667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76972.

The product of its digits is 120960, while the sum is 40.

The square root of 165441667 is about 12862.4129540300. The cubic root of 165441667 is about 548.9696046998.

The spelling of 165441667 in words is "one hundred sixty-five million, four hundred forty-one thousand, six hundred sixty-seven".