168165320 has 16 divisors (see below), whose sum is σ = 378372060. Its totient is φ = 67266112.

The previous prime is 168165289. The next prime is 168165323. The reversal of 168165320 is 23561861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 156700324 + 11464996 = 12518^2 + 3386^2 .

It is not an unprimeable number, because it can be changed into a prime (168165323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2102027 + ... + 2102106.

Almost surely, 2^168165320 is an apocalyptic number.

168165320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168165320 is an abundant number, since it is smaller than the sum of its proper divisors (210206740).

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

168165320 is a wasteful number, since it uses less digits than its factorization.

168165320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204144 (or 4204140 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 168165320 is about 12967.8571861353. The cubic root of 168165320 is about 551.9657701242.

The spelling of 168165320 in words is "one hundred sixty-eight million, one hundred sixty-five thousand, three hundred twenty".