266564352656 has 40 divisors (see below), whose sum is σ = 603976384704. Its totient is φ = 111585075840.

The previous prime is 266564352619. The next prime is 266564352661. The reversal of 266564352656 is 656253465662.

266564352656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27670055 + ... + 27679686.

Almost surely, 2^266564352656 is an apocalyptic number.

It is an amenable number.

266564352656 is an abundant number, since it is smaller than the sum of its proper divisors (337412032048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266564352656 is a wasteful number, since it uses less digits than its factorization.

266564352656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55349799 (or 55349793 counting only the distinct ones).

The product of its digits is 46656000, while the sum is 56.

The spelling of 266564352656 in words is "two hundred sixty-six billion, five hundred sixty-four million, three hundred fifty-two thousand, six hundred fifty-six".