266383560 has 128 divisors (see below), whose sum is σ = 847324800. Its totient is φ = 66877440.

The previous prime is 266383547. The next prime is 266383567. The reversal of 266383560 is 65383662.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (266383567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141747 + ... + 143613.

It is an arithmetic number, because the mean of its divisors is an integer number (6619725).

Almost surely, 2^266383560 is an apocalyptic number.

266383560 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 266383560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423662400).

266383560 is an abundant number, since it is smaller than the sum of its proper divisors (580941240).

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

266383560 is a wasteful number, since it uses less digits than its factorization.

266383560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 266383560 is about 16321.2609806963. The cubic root of 266383560 is about 643.4317286807.

The spelling of 266383560 in words is "two hundred sixty-six million, three hundred eighty-three thousand, five hundred sixty".