166143340 has 48 divisors (see below), whose sum is σ = 387828000. Its totient is φ = 59271680.

The previous prime is 166143319. The next prime is 166143347. The reversal of 166143340 is 43341661.

It is a junction number, because it is equal to n+sod(n) for n = 166143299 and 166143308.

It is not an unprimeable number, because it can be changed into a prime (166143347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4536 + ... + 18784.

It is an arithmetic number, because the mean of its divisors is an integer number (8079750).

Almost surely, 2^166143340 is an apocalyptic number.

166143340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166143340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193914000).

166143340 is an abundant number, since it is smaller than the sum of its proper divisors (221684660).

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

166143340 is a wasteful number, since it uses less digits than its factorization.

166143340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14322 (or 14320 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 166143340 is about 12889.6601972279. The cubic root of 166143340 is about 549.7446087007.

The spelling of 166143340 in words is "one hundred sixty-six million, one hundred forty-three thousand, three hundred forty".