26640245566 has 8 divisors (see below), whose sum is σ = 43593129144. Its totient is φ = 12109202520.

The previous prime is 26640245563. The next prime is 26640245603. The reversal of 26640245566 is 66554204662.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640245563) 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, 605460105 + ... + 605460148.

It is an arithmetic number, because the mean of its divisors is an integer number (5449141143).

Almost surely, 2^26640245566 is an apocalyptic number.

26640245566 is a deficient number, since it is larger than the sum of its proper divisors (16952883578).

26640245566 is a wasteful number, since it uses less digits than its factorization.

26640245566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210920266.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 26640245566 in words is "twenty-six billion, six hundred forty million, two hundred forty-five thousand, five hundred sixty-six".