266797560 has 64 divisors (see below), whose sum is σ = 808354080. Its totient is φ = 70438400.

The previous prime is 266797529. The next prime is 266797577. The reversal of 266797560 is 65797662.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114 + ... + 23126.

Almost surely, 2^266797560 is an apocalyptic number.

266797560 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 266797560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404177040).

266797560 is an abundant number, since it is smaller than the sum of its proper divisors (541556520).

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

266797560 is a wasteful number, since it uses less digits than its factorization.

266797560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22128 (or 22124 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 266797560 is about 16333.9389003388. The cubic root of 266797560 is about 643.7648859473.

The spelling of 266797560 in words is "two hundred sixty-six million, seven hundred ninety-seven thousand, five hundred sixty".