165043313556166 has 4 divisors (see below), whose sum is σ = 247564970334252. Its totient is φ = 82521656778082.

The previous prime is 165043313556161. The next prime is 165043313556167. The reversal of 165043313556166 is 661655313340561.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165043313556161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41260828389040 + ... + 41260828389043.

It is an arithmetic number, because the mean of its divisors is an integer number (61891242583563).

Almost surely, 2^{165043313556166} is an apocalyptic number.

165043313556166 is a deficient number, since it is larger than the sum of its proper divisors (82521656778086).

165043313556166 is an equidigital number, since it uses as much as digits as its factorization.

165043313556166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82521656778085.

The product of its (nonzero) digits is 17496000, while the sum is 55.

The spelling of 165043313556166 in words is "one hundred sixty-five trillion, forty-three billion, three hundred thirteen million, five hundred fifty-six thousand, one hundred sixty-six".