165005616 has 20 divisors (see below), whose sum is σ = 426264632. Its totient is φ = 55001856.

The previous prime is 165005551. The next prime is 165005627. The reversal of 165005616 is 616500561.

It is an unprimeable number.

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, 1718761 + ... + 1718856.

Almost surely, 2^165005616 is an apocalyptic number.

165005616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165005616 is an abundant number, since it is smaller than the sum of its proper divisors (261259016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165005616 is a wasteful number, since it uses less digits than its factorization.

165005616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437628 (or 3437622 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 165005616 is about 12845.4511793086. The cubic root of 165005616 is about 548.4868779350.

The spelling of 165005616 in words is "one hundred sixty-five million, five thousand, six hundred sixteen".