266220868 has 12 divisors (see below), whose sum is σ = 467001360. Its totient is φ = 132791912.

The previous prime is 266220863. The next prime is 266220887. The reversal of 266220868 is 868022662.

It is a self number, because there is not a number n which added to its sum of digits gives 266220868.

It is not an unprimeable number, because it can be changed into a prime (266220863) 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, 77746 + ... + 81097.

It is an arithmetic number, because the mean of its divisors is an integer number (38916780).

Almost surely, 2^266220868 is an apocalyptic number.

It is an amenable number.

266220868 is a deficient number, since it is larger than the sum of its proper divisors (200780492).

266220868 is a wasteful number, since it uses less digits than its factorization.

266220868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159266 (or 159264 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 266220868 is about 16316.2761682928. The cubic root of 266220868 is about 643.3007114448.

The spelling of 266220868 in words is "two hundred sixty-six million, two hundred twenty thousand, eight hundred sixty-eight".