165770223 has 8 divisors (see below), whose sum is σ = 230636928. Its totient is φ = 105708504.

The previous prime is 165770221. The next prime is 165770233. The reversal of 165770223 is 322077561.

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

It is not a de Polignac number, because 165770223 - 2¹ = 165770221 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165770221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1201165 + ... + 1201302.

It is an arithmetic number, because the mean of its divisors is an integer number (28829616).

Almost surely, 2^165770223 is an apocalyptic number.

165770223 is a deficient number, since it is larger than the sum of its proper divisors (64866705).

165770223 is a wasteful number, since it uses less digits than its factorization.

165770223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402493.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 165770223 is about 12875.1785618686. The cubic root of 165770223 is about 549.3327699435.

The spelling of 165770223 in words is "one hundred sixty-five million, seven hundred seventy thousand, two hundred twenty-three".