266620128 has 24 divisors (see below), whose sum is σ = 699878088. Its totient is φ = 88873344.

The previous prime is 266620127. The next prime is 266620177. The reversal of 266620128 is 821026662.

266620128 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 (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266620127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388551 + ... + 1388742.

It is an arithmetic number, because the mean of its divisors is an integer number (29161587).

Almost surely, 2^266620128 is an apocalyptic number.

It is an amenable number.

266620128 is an abundant number, since it is smaller than the sum of its proper divisors (433257960).

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

266620128 is a wasteful number, since it uses less digits than its factorization.

266620128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777306 (or 2777298 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 266620128 is about 16328.5066065455. The cubic root of 266620128 is about 643.6221437348.

The spelling of 266620128 in words is "two hundred sixty-six million, six hundred twenty thousand, one hundred twenty-eight".