128548066 has 4 divisors (see below), whose sum is σ = 192822102. Its totient is φ = 64274032.

The previous prime is 128548031. The next prime is 128548087. The reversal of 128548066 is 660845821.

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., 86881041 + 41667025 = 9321^2 + 6455^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32137015 + ... + 32137018.

Almost surely, 2^128548066 is an apocalyptic number.

128548066 is a deficient number, since it is larger than the sum of its proper divisors (64274036).

128548066 is an equidigital number, since it uses as much as digits as its factorization.

128548066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64274035.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 128548066 is about 11337.9039509073. The cubic root of 128548066 is about 504.6866873327.

The spelling of 128548066 in words is "one hundred twenty-eight million, five hundred forty-eight thousand, sixty-six".