266211887856 has 40 divisors (see below), whose sum is σ = 706300914384. Its totient is φ = 86338990080.

The previous prime is 266211887831. The next prime is 266211887863. The reversal of 266211887856 is 658788112662.

It is a self number, because there is not a number n which added to its sum of digits gives 266211887856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74945265 + ... + 74948816.

Almost surely, 2^266211887856 is an apocalyptic number.

It is an amenable number.

266211887856 is an abundant number, since it is smaller than the sum of its proper divisors (440089026528).

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

266211887856 is a wasteful number, since it uses less digits than its factorization.

266211887856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149894129 (or 149894123 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 60.

The spelling of 266211887856 in words is "two hundred sixty-six billion, two hundred eleven million, eight hundred eighty-seven thousand, eight hundred fifty-six".