266870688 has 192 divisors, whose sum is σ = 836075520. Its totient is φ = 72963072.

The previous prime is 266870663. The next prime is 266870707. The reversal of 266870688 is 886078662.

266870688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266870688² = 142439928227186688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266870688.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2101281 + ... + 2101407.

It is an arithmetic number, because the mean of its divisors is an integer number (4354560).

Almost surely, 2^266870688 is an apocalyptic number.

266870688 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 266870688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418037760).

266870688 is an abundant number, since it is smaller than the sum of its proper divisors (569204832).

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

266870688 is a wasteful number, since it uses less digits than its factorization.

266870688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The square root of 266870688 is about 16336.1772762173. The cubic root of 266870688 is about 643.8236982518.

The spelling of 266870688 in words is "two hundred sixty-six million, eight hundred seventy thousand, six hundred eighty-eight".