266560425 has 72 divisors (see below), whose sum is σ = 509404896. Its totient is φ = 132779520.

The previous prime is 266560417. The next prime is 266560447. The reversal of 266560425 is 524065662.

266560425 is a `hidden beast` number, since 26 + 6 + 5 + 604 + 25 = 666.

It is not a de Polignac number, because 266560425 - 2³ = 266560417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 266560425.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 868122 + ... + 868428.

It is an arithmetic number, because the mean of its divisors is an integer number (7075068).

Almost surely, 2^266560425 is an apocalyptic number.

266560425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266560425 is a deficient number, since it is larger than the sum of its proper divisors (242844471).

266560425 is a wasteful number, since it uses less digits than its factorization.

266560425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 266560425 is about 16326.6783210793. The cubic root of 266560425 is about 643.5740990483.

The spelling of 266560425 in words is "two hundred sixty-six million, five hundred sixty thousand, four hundred twenty-five".