165791027 has 4 divisors (see below), whose sum is σ = 165887040. Its totient is φ = 165695016.

The previous prime is 165791009. The next prime is 165791029. The reversal of 165791027 is 720197561.

165791027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 165791027 - 2¹² = 165786931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165791029) 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, 45368 + ... + 48885.

It is an arithmetic number, because the mean of its divisors is an integer number (41471760).

Almost surely, 2^165791027 is an apocalyptic number.

165791027 is a deficient number, since it is larger than the sum of its proper divisors (96013).

165791027 is an equidigital number, since it uses as much as digits as its factorization.

165791027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96012.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 165791027 is about 12875.9864476474. The cubic root of 165791027 is about 549.3557492231.

The spelling of 165791027 in words is "one hundred sixty-five million, seven hundred ninety-one thousand, twenty-seven".