128338501066 has 16 divisors (see below), whose sum is σ = 199825655400. Its totient is φ = 61745053888.

The previous prime is 128338500989. The next prime is 128338501157. The reversal of 128338501066 is 660105833821.

It can be written as a sum of positive squares in 4 ways, for example, as 111158894025 + 17179607041 = 333405^2 + 131071^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3759001 + ... + 3792988.

Almost surely, 2^128338501066 is an apocalyptic number.

128338501066 is a deficient number, since it is larger than the sum of its proper divisors (71487154334).

128338501066 is a wasteful number, since it uses less digits than its factorization.

128338501066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552313.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 128338501066 in words is "one hundred twenty-eight billion, three hundred thirty-eight million, five hundred one thousand, sixty-six".