165275899 has 4 divisors (see below), whose sum is σ = 165305320. Its totient is φ = 165246480.

The previous prime is 165275897. The next prime is 165275917. The reversal of 165275899 is 998572561.

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 165275899 - 2¹ = 165275897 is a prime.

It is a super-2 number, since 2×165275899² = 54632245580516402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165275893) 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, 3369 + ... + 18490.

It is an arithmetic number, because the mean of its divisors is an integer number (41326330).

Almost surely, 2^165275899 is an apocalyptic number.

165275899 is a deficient number, since it is larger than the sum of its proper divisors (29421).

165275899 is an equidigital number, since it uses as much as digits as its factorization.

165275899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29420.

The product of its digits is 1360800, while the sum is 52.

The square root of 165275899 is about 12855.9674470652. The cubic root of 165275899 is about 548.7861926132.

The spelling of 165275899 in words is "one hundred sixty-five million, two hundred seventy-five thousand, eight hundred ninety-nine".