266239380960 has 576 divisors, whose sum is σ = 1063258140672. Its totient is φ = 59401064448.

The previous prime is 266239380949. The next prime is 266239380971. The reversal of 266239380960 is 69083932662.

266239380960 is a `hidden beast` number, since 2 + 6 + 623 + 9 + 3 + 8 + 0 + 9 + 6 + 0 = 666.

266239380960 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (266239380949) and next prime (266239380971).

It is a junction number, because it is equal to n+sod(n) for n = 266239380897 and 266239380906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 344423134 + ... + 344423906.

It is an arithmetic number, because the mean of its divisors is an integer number (1845934272).

Almost surely, 2^266239380960 is an apocalyptic number.

266239380960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266239380960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531629070336).

266239380960 is an abundant number, since it is smaller than the sum of its proper divisors (797018759712).

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

266239380960 is a wasteful number, since it uses less digits than its factorization.

266239380960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 266239380960 in words is "two hundred sixty-six billion, two hundred thirty-nine million, three hundred eighty thousand, nine hundred sixty".