128066 has 4 divisors (see below), whose sum is σ = 192102. Its totient is φ = 64032.

The previous prime is 128053. The next prime is 128099. The reversal of 128066 is 660821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75625 + 52441 = 275^2 + 229^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128066.

It is an unprimeable number.

128066 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32015 + ... + 32018.

2¹²⁸⁰⁶⁶ is an apocalyptic number.

128066 is a deficient number, since it is larger than the sum of its proper divisors (64036).

128066 is an equidigital number, since it uses as much as digits as its factorization.

128066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64035.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 128066 is about 357.8631023171. The cubic root of 128066 is about 50.4055024647.

Adding to 128066 its reverse (660821), we get a palindrome (788887).

The spelling of 128066 in words is "one hundred twenty-eight thousand, sixty-six".