165201066018 has 12 divisors (see below), whose sum is σ = 357935643078. Its totient is φ = 55067022000.

The previous prime is 165201066011. The next prime is 165201066067. The reversal of 165201066018 is 810660102561.

165201066018 is a `hidden beast` number, since 16 + 5 + 20 + 10 + 6 + 601 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 126211799169 + 38989266849 = 355263^2 + 197457^2 .

It is not an unprimeable number, because it can be changed into a prime (165201066011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4588918483 + ... + 4588918518.

Almost surely, 2^165201066018 is an apocalyptic number.

165201066018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

165201066018 is an abundant number, since it is smaller than the sum of its proper divisors (192734577060).

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

165201066018 is a wasteful number, since it uses less digits than its factorization.

165201066018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9177837009 (or 9177837006 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Adding to 165201066018 its reverse (810660102561), we get a palindrome (975861168579).

The spelling of 165201066018 in words is "one hundred sixty-five billion, two hundred one million, sixty-six thousand, eighteen".