266375040 has 128 divisors (see below), whose sum is σ = 899125920. Its totient is φ = 66846720.

The previous prime is 266375017. The next prime is 266375047. The reversal of 266375040 is 40573662.

It is a Cunningham number, because it is equal to 16321²-1.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 266374992 and 266375010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266375047) 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 15 ways as a sum of consecutive naturals, for example, 28560 + ... + 36720.

Almost surely, 2^266375040 is an apocalyptic number.

266375040 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 266375040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449562960).

266375040 is an abundant number, since it is smaller than the sum of its proper divisors (632750880).

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

266375040 is a wasteful number, since it uses less digits than its factorization.

266375040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200 (or 8188 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 266375040 is about 16320.9999693646. Note that the first 4 decimals coincide. The cubic root of 266375040 is about 643.4248687769.

The spelling of 266375040 in words is "two hundred sixty-six million, three hundred seventy-five thousand, forty".