166320260 has 24 divisors (see below), whose sum is σ = 350119896. Its totient is φ = 66366720.

The previous prime is 166320257. The next prime is 166320277. The reversal of 166320260 is 62023661.

It can be written as a sum of positive squares in 4 ways, for example, as 3655744 + 162664516 = 1912^2 + 12754^2 .

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, 1457 + ... + 18296.

It is an arithmetic number, because the mean of its divisors is an integer number (14588329).

Almost surely, 2^166320260 is an apocalyptic number.

166320260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166320260 is an abundant number, since it is smaller than the sum of its proper divisors (183799636).

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

166320260 is a wasteful number, since it uses less digits than its factorization.

166320260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20183 (or 20181 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 166320260 is about 12896.5212363645. The cubic root of 166320260 is about 549.9396738242.

The spelling of 166320260 in words is "one hundred sixty-six million, three hundred twenty thousand, two hundred sixty".