166444330 has 32 divisors (see below), whose sum is σ = 336680064. Its totient is φ = 58783296.

The previous prime is 166444321. The next prime is 166444339. The reversal of 166444330 is 33444661.

It is a happy number.

166444330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166444321) and next prime (166444339).

It is a super-3 number, since 3×166444330³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166444292 and 166444301.

It is not an unprimeable number, because it can be changed into a prime (166444339) 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 15 ways as a sum of consecutive naturals, for example, 24844 + ... + 30823.

It is an arithmetic number, because the mean of its divisors is an integer number (10521252).

Almost surely, 2^166444330 is an apocalyptic number.

166444330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166444330 is an abundant number, since it is smaller than the sum of its proper divisors (170235734).

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

166444330 is a wasteful number, since it uses less digits than its factorization.

166444330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55710.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 166444330 is about 12901.3305515361. The cubic root of 166444330 is about 550.0763860849.

Adding to 166444330 its reverse (33444661), we get a palindrome (199888991).

The spelling of 166444330 in words is "one hundred sixty-six million, four hundred forty-four thousand, three hundred thirty".