166423560 has 32 divisors (see below), whose sum is σ = 499271040. Its totient is φ = 44379584.

The previous prime is 166423541. The next prime is 166423571. The reversal of 166423560 is 65324661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693312 + ... + 693551.

It is an arithmetic number, because the mean of its divisors is an integer number (15602220).

Almost surely, 2^166423560 is an apocalyptic number.

166423560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166423560 is an abundant number, since it is smaller than the sum of its proper divisors (332847480).

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

166423560 is a wasteful number, since it uses less digits than its factorization.

166423560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386877 (or 1386873 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 166423560 is about 12900.5255706890. The cubic root of 166423560 is about 550.0535044368.

It can be divided in two parts, 16642 and 3560, that added together give a palindrome (20202).

The spelling of 166423560 in words is "one hundred sixty-six million, four hundred twenty-three thousand, five hundred sixty".