165079685 has 4 divisors (see below), whose sum is σ = 198095628. Its totient is φ = 132063744.

The previous prime is 165079661. The next prime is 165079697. The reversal of 165079685 is 586970561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90136036 + 74943649 = 9494^2 + 8657^2 .

It is a cyclic number.

It is not a de Polignac number, because 165079685 - 2¹⁶ = 165014149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16507964 + ... + 16507973.

It is an arithmetic number, because the mean of its divisors is an integer number (49523907).

Almost surely, 2^165079685 is an apocalyptic number.

It is an amenable number.

165079685 is a deficient number, since it is larger than the sum of its proper divisors (33015943).

165079685 is an equidigital number, since it uses as much as digits as its factorization.

165079685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33015942.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 165079685 is about 12848.3339386864. Note that the first 3 decimals coincide. The cubic root of 165079685 is about 548.5689353386.

The spelling of 165079685 in words is "one hundred sixty-five million, seventy-nine thousand, six hundred eighty-five".