266308560 has 480 divisors, whose sum is σ = 1126594560. Its totient is φ = 57106944.

The previous prime is 266308547. The next prime is 266308597. The reversal of 266308560 is 65803662.

266308560 is a `hidden beast` number, since 2 + 66 + 30 + 8 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 2585469 + ... + 2585571.

It is an arithmetic number, because the mean of its divisors is an integer number (2347072).

Almost surely, 2^266308560 is an apocalyptic number.

266308560 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 266308560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563297280).

266308560 is an abundant number, since it is smaller than the sum of its proper divisors (860286000).

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

266308560 is a wasteful number, since it uses less digits than its factorization.

266308560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 266308560 is about 16318.9632023606. The cubic root of 266308560 is about 643.3713371794.

The spelling of 266308560 in words is "two hundred sixty-six million, three hundred eight thousand, five hundred sixty".