166700128 has 48 divisors (see below), whose sum is σ = 376959744. Its totient is φ = 71084160.

The previous prime is 166700101. The next prime is 166700141. The reversal of 166700128 is 821007661.

166700128 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 166700128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45501 + ... + 49027.

It is an arithmetic number, because the mean of its divisors is an integer number (7853328).

Almost surely, 2^166700128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166700128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188479872).

166700128 is an abundant number, since it is smaller than the sum of its proper divisors (210259616).

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

166700128 is a wasteful number, since it uses less digits than its factorization.

166700128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755 (or 3747 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 166700128 is about 12911.2403741856. The cubic root of 166700128 is about 550.3580346475.

Adding to 166700128 its reverse (821007661), we get a palindrome (987707789).

The spelling of 166700128 in words is "one hundred sixty-six million, seven hundred thousand, one hundred twenty-eight".