266957340 has 96 divisors (see below), whose sum is σ = 810734400. Its totient is φ = 65243136.

The previous prime is 266957311. The next prime is 266957347. The reversal of 266957340 is 43759662.

It is a junction number, because it is equal to n+sod(n) for n = 266957292 and 266957301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266957347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115072 + ... + 117368.

It is an arithmetic number, because the mean of its divisors is an integer number (8445150).

Almost surely, 2^266957340 is an apocalyptic number.

266957340 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 266957340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405367200).

266957340 is an abundant number, since it is smaller than the sum of its proper divisors (543777060).

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

266957340 is a wasteful number, since it uses less digits than its factorization.

266957340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 266957340 is about 16338.8292114215. The cubic root of 266957340 is about 643.8933731625.

The spelling of 266957340 in words is "two hundred sixty-six million, nine hundred fifty-seven thousand, three hundred forty".