166325730 has 64 divisors (see below), whose sum is σ = 424189440. Its totient is φ = 41658624.

The previous prime is 166325707. The next prime is 166325737. The reversal of 166325730 is 37523661.

It is a junction number, because it is equal to n+sod(n) for n = 166325691 and 166325700.

It is not an unprimeable number, because it can be changed into a prime (166325737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29607 + ... + 34773.

It is an arithmetic number, because the mean of its divisors is an integer number (6627960).

Almost surely, 2^166325730 is an apocalyptic number.

166325730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166325730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212094720).

166325730 is an abundant number, since it is smaller than the sum of its proper divisors (257863710).

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

166325730 is a wasteful number, since it uses less digits than its factorization.

166325730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 166325730 is about 12896.7333073147. The cubic root of 166325730 is about 549.9457026288.

The spelling of 166325730 in words is "one hundred sixty-six million, three hundred twenty-five thousand, seven hundred thirty".