165790816 has 12 divisors (see below), whose sum is σ = 326400732. Its totient is φ = 82895392.

The previous prime is 165790787. The next prime is 165790819. The reversal of 165790816 is 618097561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165790819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590450 + ... + 2590513.

It is an arithmetic number, because the mean of its divisors is an integer number (27200061).

Almost surely, 2^165790816 is an apocalyptic number.

165790816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165790816 is a deficient number, since it is larger than the sum of its proper divisors (160609916).

165790816 is an equidigital number, since it uses as much as digits as its factorization.

165790816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180973 (or 5180965 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 165790816 is about 12875.9782540978. The cubic root of 165790816 is about 549.3555161704.

The spelling of 165790816 in words is "one hundred sixty-five million, seven hundred ninety thousand, eight hundred sixteen".