165111506606 has 8 divisors (see below), whose sum is σ = 247669616520. Its totient is φ = 82554967768.

The previous prime is 165111506557. The next prime is 165111506629. The reversal of 165111506606 is 606605111561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×165111506606² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165111506606.

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, 80321 + ... + 580236.

It is an arithmetic number, because the mean of its divisors is an integer number (30958702065).

Almost surely, 2^165111506606 is an apocalyptic number.

165111506606 is a deficient number, since it is larger than the sum of its proper divisors (82558109914).

165111506606 is a wasteful number, since it uses less digits than its factorization.

165111506606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785538.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 165111506606 in words is "one hundred sixty-five billion, one hundred eleven million, five hundred six thousand, six hundred six".