166340 has 12 divisors (see below), whose sum is σ = 349356. Its totient is φ = 66528.

The previous prime is 166319. The next prime is 166349. The reversal of 166340 is 43661.

It can be written as a sum of positive squares in 2 ways, for example, as 123904 + 42436 = 352^2 + 206^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 8317 = 166340 / (1 + 6 + 6 + 3 + 4 + 0).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (166349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4139 + ... + 4178.

It is an arithmetic number, because the mean of its divisors is an integer number (29113).

2¹⁶⁶³⁴⁰ is an apocalyptic number.

166340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166340 is an abundant number, since it is smaller than the sum of its proper divisors (183016).

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

166340 is a wasteful number, since it uses less digits than its factorization.

166340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326 (or 8324 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 166340 is about 407.8480109060. The cubic root of 166340 is about 54.9961429802.

The spelling of 166340 in words is "one hundred sixty-six thousand, three hundred forty".