128808066 has 8 divisors (see below), whose sum is σ = 257616144. Its totient is φ = 42936020.

The previous prime is 128808061. The next prime is 128808067. The reversal of 128808066 is 660808821.

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

128808066 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (128808061) 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, 10734000 + ... + 10734011.

It is an arithmetic number, because the mean of its divisors is an integer number (32202018).

Almost surely, 2^128808066 is an apocalyptic number.

128808066 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.

128808066 is a wasteful number, since it uses less digits than its factorization.

128808066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21468016.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 128808066 is about 11349.3641231569. The cubic root of 128808066 is about 505.0267162287.

The spelling of 128808066 in words is "one hundred twenty-eight million, eight hundred eight thousand, sixty-six".