166775520 has 96 divisors (see below), whose sum is σ = 543503520. Its totient is φ = 42936320.

The previous prime is 166775519. The next prime is 166775527. The reversal of 166775520 is 25577661.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166775527) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7930 + ... + 19910.

It is an arithmetic number, because the mean of its divisors is an integer number (5661495).

Almost surely, 2^166775520 is an apocalyptic number.

166775520 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 166775520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271751760).

166775520 is an abundant number, since it is smaller than the sum of its proper divisors (376728000).

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

166775520 is a wasteful number, since it uses less digits than its factorization.

166775520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12028 (or 12020 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 166775520 is about 12914.1596706871. The cubic root of 166775520 is about 550.4409906713.

The spelling of 166775520 in words is "one hundred sixty-six million, seven hundred seventy-five thousand, five hundred twenty".