26566532787 has 4 divisors (see below), whose sum is σ = 35422043720. Its totient is φ = 17711021856.

The previous prime is 26566532779. The next prime is 26566532807. The reversal of 26566532787 is 78723566562.

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

It is not a de Polignac number, because 26566532787 - 2³ = 26566532779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26566532767) 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, 4427755462 + ... + 4427755467.

It is an arithmetic number, because the mean of its divisors is an integer number (8855510930).

Almost surely, 2^26566532787 is an apocalyptic number.

26566532787 is a deficient number, since it is larger than the sum of its proper divisors (8855510933).

26566532787 is an equidigital number, since it uses as much as digits as its factorization.

26566532787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8855510932.

The product of its digits is 25401600, while the sum is 57.

The spelling of 26566532787 in words is "twenty-six billion, five hundred sixty-six million, five hundred thirty-two thousand, seven hundred eighty-seven".