165770226 has 40 divisors (see below), whose sum is σ = 373065264. Its totient is φ = 55243620.

The previous prime is 165770221. The next prime is 165770233. The reversal of 165770226 is 622077561.

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 19 ways as a sum of consecutive naturals, for example, 37261 + ... + 41471.

Almost surely, 2^165770226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165770226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186532632).

165770226 is an abundant number, since it is smaller than the sum of its proper divisors (207295038).

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

165770226 is an frugal number, since it uses more digits than its factorization.

165770226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240 (or 4216 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 165770226 is about 12875.1786783718. The cubic root of 165770226 is about 549.3327732573.

The spelling of 165770226 in words is "one hundred sixty-five million, seven hundred seventy thousand, two hundred twenty-six".