165216061 has 8 divisors (see below), whose sum is σ = 172529280. Its totient is φ = 157913712.

The previous prime is 165216059. The next prime is 165216067. The reversal of 165216061 is 160612561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165216061 - 2¹ = 165216059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165216067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52120 + ... + 55198.

It is an arithmetic number, because the mean of its divisors is an integer number (21566160).

Almost surely, 2^165216061 is an apocalyptic number.

It is an amenable number.

165216061 is a deficient number, since it is larger than the sum of its proper divisors (7313219).

165216061 is a wasteful number, since it uses less digits than its factorization.

165216061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 165216061 is about 12853.6399902907. The cubic root of 165216061 is about 548.7199554260.

The spelling of 165216061 in words is "one hundred sixty-five million, two hundred sixteen thousand, sixty-one".