166464138 has 8 divisors (see below), whose sum is σ = 332928288. Its totient is φ = 55488044.

The previous prime is 166464131. The next prime is 166464143. The reversal of 166464138 is 831464661.

166464138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

166464138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 166464096 and 166464105.

It is not an unprimeable number, because it can be changed into a prime (166464131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13872006 + ... + 13872017.

It is an arithmetic number, because the mean of its divisors is an integer number (41616036).

Almost surely, 2^166464138 is an apocalyptic number.

166464138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166464138 is a wasteful number, since it uses less digits than its factorization.

166464138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27744028.

The product of its digits is 82944, while the sum is 39.

The square root of 166464138 is about 12902.0982014555. The cubic root of 166464138 is about 550.0982061551.

The spelling of 166464138 in words is "one hundred sixty-six million, four hundred sixty-four thousand, one hundred thirty-eight".