165111012 has 36 divisors (see below), whose sum is σ = 455307216. Its totient is φ = 50033520.

The previous prime is 165110993. The next prime is 165111017. The reversal of 165111012 is 210111561.

It is a happy number.

165111012 is a `hidden beast` number, since 1 + 651 + 1 + 1 + 0 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (165111017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208078 + ... + 208869.

Almost surely, 2^165111012 is an apocalyptic number.

165111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165111012 is an abundant number, since it is smaller than the sum of its proper divisors (290196204).

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

165111012 is a wasteful number, since it uses less digits than its factorization.

165111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416968 (or 416963 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The square root of 165111012 is about 12849.5529883339. The cubic root of 165111012 is about 548.6036335957.

Adding to 165111012 its reverse (210111561), we get a palindrome (375222573).

The spelling of 165111012 in words is "one hundred sixty-five million, one hundred eleven thousand, twelve".