165499061 has 16 divisors (see below), whose sum is σ = 205680384. Its totient is φ = 129665664.

The previous prime is 165499051. The next prime is 165499091. The reversal of 165499061 is 160994561.

It is a cyclic number.

It is not a de Polignac number, because 165499061 - 2⁶ = 165498997 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165499021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545 + ... + 18201.

It is an arithmetic number, because the mean of its divisors is an integer number (12855024).

Almost surely, 2^165499061 is an apocalyptic number.

It is an amenable number.

165499061 is a deficient number, since it is larger than the sum of its proper divisors (40181323).

165499061 is a wasteful number, since it uses less digits than its factorization.

165499061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17780.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 165499061 is about 12864.6438349455. The cubic root of 165499061 is about 549.0330790738.

The spelling of 165499061 in words is "one hundred sixty-five million, four hundred ninety-nine thousand, sixty-one".