266728736 has 12 divisors (see below), whose sum is σ = 525122262. Its totient is φ = 133364352.

The previous prime is 266728733. The next prime is 266728751. The reversal of 266728736 is 637827662.

It can be written as a sum of positive squares in only one way, i.e., 254083600 + 12645136 = 15940^2 + 3556^2 .

It is a super-2 number, since 2×266728736² = 142288437216315392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266728733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4167605 + ... + 4167668.

Almost surely, 2^266728736 is an apocalyptic number.

It is an amenable number.

266728736 is a deficient number, since it is larger than the sum of its proper divisors (258393526).

266728736 is an equidigital number, since it uses as much as digits as its factorization.

266728736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8335283 (or 8335275 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The square root of 266728736 is about 16331.8319854204. The cubic root of 266728736 is about 643.7095252650.

The spelling of 266728736 in words is "two hundred sixty-six million, seven hundred twenty-eight thousand, seven hundred thirty-six".