166321760 has 120 divisors (see below), whose sum is σ = 438313680. Its totient is φ = 59628800.

The previous prime is 166321759. The next prime is 166321783. The reversal of 166321760 is 67123661.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2342525 + ... + 2342595.

It is an arithmetic number, because the mean of its divisors is an integer number (3652614).

Almost surely, 2^166321760 is an apocalyptic number.

166321760 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 166321760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219156840).

166321760 is an abundant number, since it is smaller than the sum of its proper divisors (271991920).

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

166321760 is an frugal number, since it uses more digits than its factorization.

166321760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 166321760 is about 12896.5793914511. The cubic root of 166321760 is about 549.9413270744.

The spelling of 166321760 in words is "one hundred sixty-six million, three hundred twenty-one thousand, seven hundred sixty".