266443216388 has 12 divisors (see below), whose sum is σ = 476196387072. Its totient is φ = 130387105800.

The previous prime is 266443216381. The next prime is 266443216397. The reversal of 266443216388 is 883612344662.

It is not an unprimeable number, because it can be changed into a prime (266443216381) 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, 708625388 + ... + 708625763.

It is an arithmetic number, because the mean of its divisors is an integer number (39683032256).

Almost surely, 2^266443216388 is an apocalyptic number.

It is an amenable number.

266443216388 is a deficient number, since it is larger than the sum of its proper divisors (209753170684).

266443216388 is a wasteful number, since it uses less digits than its factorization.

266443216388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417251202 (or 1417251200 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 53.

The spelling of 266443216388 in words is "two hundred sixty-six billion, four hundred forty-three million, two hundred sixteen thousand, three hundred eighty-eight".