266978880 has 672 divisors, whose sum is σ = 1198229760. Its totient is φ = 53084160.

The previous prime is 266978837. The next prime is 266978891. The reversal of 266978880 is 88879662.

266978880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (672).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6511660 + ... + 6511700.

It is an arithmetic number, because the mean of its divisors is an integer number (1783080).

Almost surely, 2^266978880 is an apocalyptic number.

266978880 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 266978880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (599114880).

266978880 is an abundant number, since it is smaller than the sum of its proper divisors (931250880).

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

266978880 is a wasteful number, since it uses less digits than its factorization.

266978880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 266978880 is about 16339.4883640829. The cubic root of 266978880 is about 643.9106906488.

The spelling of 266978880 in words is "two hundred sixty-six million, nine hundred seventy-eight thousand, eight hundred eighty".