266943768 has 192 divisors, whose sum is σ = 880992000. Its totient is φ = 66624768.

The previous prime is 266943763. The next prime is 266943769. The reversal of 266943768 is 867349662.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 266943768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266943763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 290013 + ... + 290931.

It is an arithmetic number, because the mean of its divisors is an integer number (4588500).

Almost surely, 2^266943768 is an apocalyptic number.

266943768 is a gapful number since it is divisible by the number (28) 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 266943768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440496000).

266943768 is an abundant number, since it is smaller than the sum of its proper divisors (614048232).

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

266943768 is a wasteful number, since it uses less digits than its factorization.

266943768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 963 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 266943768 is about 16338.4138765059. The cubic root of 266943768 is about 643.8824612206.

The spelling of 266943768 in words is "two hundred sixty-six million, nine hundred forty-three thousand, seven hundred sixty-eight".