165969775766 has 16 divisors (see below), whose sum is σ = 250276664160. Its totient is φ = 82545200640.

The previous prime is 165969775757. The next prime is 165969775781. The reversal of 165969775766 is 667577969561.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165969775693 and 165969775702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95030 + ... + 583926.

It is an arithmetic number, because the mean of its divisors is an integer number (15642291510).

Almost surely, 2^165969775766 is an apocalyptic number.

165969775766 is a deficient number, since it is larger than the sum of its proper divisors (84306888394).

165969775766 is a wasteful number, since it uses less digits than its factorization.

165969775766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489799.

The product of its digits is 900169200, while the sum is 74.

The spelling of 165969775766 in words is "one hundred sixty-five billion, nine hundred sixty-nine million, seven hundred seventy-five thousand, seven hundred sixty-six".