266562881320 has 16 divisors (see below), whose sum is σ = 599766483060. Its totient is φ = 106625152512.

The previous prime is 266562881311. The next prime is 266562881323. The reversal of 266562881320 is 23188265662.

It can be written as a sum of positive squares in 2 ways, for example, as 255572713764 + 10990167556 = 505542^2 + 104834^2 .

It is not an unprimeable number, because it can be changed into a prime (266562881323) 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, 3332035977 + ... + 3332036056.

Almost surely, 2^266562881320 is an apocalyptic number.

266562881320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266562881320 is an abundant number, since it is smaller than the sum of its proper divisors (333203601740).

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

266562881320 is a wasteful number, since it uses less digits than its factorization.

266562881320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664072044 (or 6664072040 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 266562881320 in words is "two hundred sixty-six billion, five hundred sixty-two million, eight hundred eighty-one thousand, three hundred twenty".