166543560 has 256 divisors, whose sum is σ = 603417600. Its totient is φ = 40697856.

The previous prime is 166543547. The next prime is 166543561. The reversal of 166543560 is 65345661.

166543560 is a `hidden beast` number, since 1 + 66 + 543 + 56 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (166543561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 862824 + ... + 863016.

It is an arithmetic number, because the mean of its divisors is an integer number (2357100).

Almost surely, 2^166543560 is an apocalyptic number.

166543560 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 166543560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301708800).

166543560 is an abundant number, since it is smaller than the sum of its proper divisors (436874040).

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

166543560 is a wasteful number, since it uses less digits than its factorization.

166543560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 166543560 is about 12905.1757058941. The cubic root of 166543560 is about 550.1856783553.

The spelling of 166543560 in words is "one hundred sixty-six million, five hundred forty-three thousand, five hundred sixty".