165790799 has 4 divisors (see below), whose sum is σ = 165948120. Its totient is φ = 165633480.

The previous prime is 165790787. The next prime is 165790819. The reversal of 165790799 is 997097561.

165790799 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, and also an emirpimes, since its reverse is a distinct semiprime: 997097561 = 19 ⋅52478819.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165790799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165790799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165790769) 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, 77069 + ... + 79190.

It is an arithmetic number, because the mean of its divisors is an integer number (41487030).

Almost surely, 2^165790799 is an apocalyptic number.

165790799 is a deficient number, since it is larger than the sum of its proper divisors (157321).

165790799 is a wasteful number, since it uses less digits than its factorization.

165790799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157320.

The product of its (nonzero) digits is 1071630, while the sum is 53.

The square root of 165790799 is about 12875.9775939538. The cubic root of 165790799 is about 549.3554973937.

The spelling of 165790799 in words is "one hundred sixty-five million, seven hundred ninety thousand, seven hundred ninety-nine".