266520464 has 80 divisors (see below), whose sum is σ = 612282240. Its totient is φ = 110023680.

The previous prime is 266520461. The next prime is 266520491. The reversal of 266520464 is 464025662.

266520464 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (266520461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349844 + ... + 350604.

It is an arithmetic number, because the mean of its divisors is an integer number (7653528).

Almost surely, 2^266520464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266520464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306141120).

266520464 is an abundant number, since it is smaller than the sum of its proper divisors (345761776).

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

266520464 is a wasteful number, since it uses less digits than its factorization.

266520464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 266520464 is about 16325.4544806569. The cubic root of 266520464 is about 643.5419372975.

The spelling of 266520464 in words is "two hundred sixty-six million, five hundred twenty thousand, four hundred sixty-four".