266223061530 has 256 divisors, whose sum is σ = 782623296000. Its totient is φ = 64096800768.

The previous prime is 266223061529. The next prime is 266223061553. The reversal of 266223061530 is 35160322662.

266223061530 is a `hidden beast` number, since 2 + 6 + 6 + 2 + 2 + 3 + 0 + 615 + 30 = 666.

266223061530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20891901 + ... + 20904639.

It is an arithmetic number, because the mean of its divisors is an integer number (3057122250).

Almost surely, 2^266223061530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266223061530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391311648000).

266223061530 is an abundant number, since it is smaller than the sum of its proper divisors (516400234470).

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

266223061530 is a wasteful number, since it uses less digits than its factorization.

266223061530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12958 (or 12952 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 266223061530 in words is "two hundred sixty-six billion, two hundred twenty-three million, sixty-one thousand, five hundred thirty".