128666337287 has 4 divisors (see below), whose sum is σ = 130112026560. Its totient is φ = 127220648016.

The previous prime is 128666337281. The next prime is 128666337307. The reversal of 128666337287 is 782733666821.

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

It is a cyclic number.

It is not a de Polignac number, because 128666337287 - 2⁶ = 128666337223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128666337281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722844503 + ... + 722844680.

It is an arithmetic number, because the mean of its divisors is an integer number (32528006640).

Almost surely, 2^128666337287 is an apocalyptic number.

128666337287 is a deficient number, since it is larger than the sum of its proper divisors (1445689273).

128666337287 is an equidigital number, since it uses as much as digits as its factorization.

128666337287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445689272.

The product of its digits is 24385536, while the sum is 59.

The spelling of 128666337287 in words is "one hundred twenty-eight billion, six hundred sixty-six million, three hundred thirty-seven thousand, two hundred eighty-seven".