266560938 has 96 divisors (see below), whose sum is σ = 700876800. Its totient is φ = 71568288.

The previous prime is 266560927. The next prime is 266560939. The reversal of 266560938 is 839065662.

It is a happy number.

266560938 is a `hidden beast` number, since 2 + 6 + 6 + 5 + 609 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 266560893 and 266560902.

It is not an unprimeable number, because it can be changed into a prime (266560939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170203 + ... + 171761.

It is an arithmetic number, because the mean of its divisors is an integer number (7300800).

Almost surely, 2^266560938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266560938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350438400).

266560938 is an abundant number, since it is smaller than the sum of its proper divisors (434315862).

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

266560938 is a wasteful number, since it uses less digits than its factorization.

266560938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 266560938 is about 16326.6940315546. The cubic root of 266560938 is about 643.5745119044.

The spelling of 266560938 in words is "two hundred sixty-six million, five hundred sixty thousand, nine hundred thirty-eight".