165884899 has 4 divisors (see below), whose sum is σ = 167495536. Its totient is φ = 164274264.

The previous prime is 165884869. The next prime is 165884903. The reversal of 165884899 is 998488561.

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 165884899 - 2²³ = 157496291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165884819) 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, 805164 + ... + 805369.

It is an arithmetic number, because the mean of its divisors is an integer number (41873884).

Almost surely, 2^165884899 is an apocalyptic number.

165884899 is a deficient number, since it is larger than the sum of its proper divisors (1610637).

165884899 is a wasteful number, since it uses less digits than its factorization.

165884899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610636.

The product of its digits is 4976640, while the sum is 58.

The square root of 165884899 is about 12879.6311670793. The cubic root of 165884899 is about 549.4594126399.

The spelling of 165884899 in words is "one hundred sixty-five million, eight hundred eighty-four thousand, eight hundred ninety-nine".