165016685 has 8 divisors (see below), whose sum is σ = 198124920. Its totient is φ = 131943424.

The previous prime is 165016673. The next prime is 165016693. The reversal of 165016685 is 586610561.

It can be written as a sum of positive squares in 4 ways, for example, as 4791721 + 160224964 = 2189^2 + 12658^2 .

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 165016685 - 2⁸ = 165016429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3101 + ... + 18429.

It is an arithmetic number, because the mean of its divisors is an integer number (24765615).

Almost surely, 2^165016685 is an apocalyptic number.

It is an amenable number.

165016685 is a deficient number, since it is larger than the sum of its proper divisors (33108235).

165016685 is a wasteful number, since it uses less digits than its factorization.

165016685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17487.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 165016685 is about 12845.8820249915. The cubic root of 165016685 is about 548.4991422964.

The spelling of 165016685 in words is "one hundred sixty-five million, sixteen thousand, six hundred eighty-five".