266204288820 has 48 divisors (see below), whose sum is σ = 745404851520. Its totient is φ = 70984682496.

The previous prime is 266204288803. The next prime is 266204288827. The reversal of 266204288820 is 28882402662.

It is a self number, because there is not a number n which added to its sum of digits gives 266204288820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266204288827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1487899 + ... + 1657181.

It is an arithmetic number, because the mean of its divisors is an integer number (15529267740).

Almost surely, 2^266204288820 is an apocalyptic number.

266204288820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266204288820 is an abundant number, since it is smaller than the sum of its proper divisors (479200562700).

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

266204288820 is a wasteful number, since it uses less digits than its factorization.

266204288820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195504 (or 195502 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 266204288820 in words is "two hundred sixty-six billion, two hundred four million, two hundred eighty-eight thousand, eight hundred twenty".