165884816 has 20 divisors (see below), whose sum is σ = 322788492. Its totient is φ = 82584576.

The previous prime is 165884783. The next prime is 165884819. The reversal of 165884816 is 618488561.

It can be written as a sum of positive squares in 2 ways, for example, as 70627216 + 95257600 = 8404^2 + 9760^2 .

It is not an unprimeable number, because it can be changed into a prime (165884819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18521 + ... + 25976.

Almost surely, 2^165884816 is an apocalyptic number.

165884816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165884816 is a deficient number, since it is larger than the sum of its proper divisors (156903676).

165884816 is a wasteful number, since it uses less digits than its factorization.

165884816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44738 (or 44732 counting only the distinct ones).

The product of its digits is 368640, while the sum is 47.

The square root of 165884816 is about 12879.6279449369. The cubic root of 165884816 is about 549.4593209998.

The spelling of 165884816 in words is "one hundred sixty-five million, eight hundred eighty-four thousand, eight hundred sixteen".