26566412566 has 8 divisors (see below), whose sum is σ = 39873673080. Its totient is φ = 13275188208.

The previous prime is 26566412501. The next prime is 26566412599. The reversal of 26566412566 is 66521466562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4004896 + ... + 4011523.

It is an arithmetic number, because the mean of its divisors is an integer number (4984209135).

Almost surely, 2^26566412566 is an apocalyptic number.

26566412566 is a deficient number, since it is larger than the sum of its proper divisors (13307260514).

26566412566 is a wasteful number, since it uses less digits than its factorization.

26566412566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8018078.

The product of its digits is 3110400, while the sum is 49.

The spelling of 26566412566 in words is "twenty-six billion, five hundred sixty-six million, four hundred twelve thousand, five hundred sixty-six".