266508340 has 48 divisors (see below), whose sum is σ = 641781504. Its totient is φ = 91065600.

The previous prime is 266508287. The next prime is 266508343. The reversal of 266508340 is 43805662.

It is a happy number.

266508340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 266508296 and 266508305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266508343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40480 + ... + 46600.

It is an arithmetic number, because the mean of its divisors is an integer number (13370448).

Almost surely, 2^266508340 is an apocalyptic number.

266508340 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 266508340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320890752).

266508340 is an abundant number, since it is smaller than the sum of its proper divisors (375273164).

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

266508340 is a wasteful number, since it uses less digits than its factorization.

266508340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6448 (or 6446 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 266508340 is about 16325.0831544590. The cubic root of 266508340 is about 643.5321789215.

The spelling of 266508340 in words is "two hundred sixty-six million, five hundred eight thousand, three hundred forty".