166745320 has 32 divisors (see below), whose sum is σ = 428774400. Its totient is φ = 57169728.

The previous prime is 166745309. The next prime is 166745323. The reversal of 166745320 is 23547661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (166745323) 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 7 ways as a sum of consecutive naturals, for example, 297480 + ... + 298039.

It is an arithmetic number, because the mean of its divisors is an integer number (13399200).

Almost surely, 2^166745320 is an apocalyptic number.

166745320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166745320 is an abundant number, since it is smaller than the sum of its proper divisors (262029080).

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

166745320 is a wasteful number, since it uses less digits than its factorization.

166745320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595537 (or 595533 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 166745320 is about 12912.9903585498. The cubic root of 166745320 is about 550.4077637296.

The spelling of 166745320 in words is "one hundred sixty-six million, seven hundred forty-five thousand, three hundred twenty".