266307720 has 192 divisors, whose sum is σ = 970807680. Its totient is φ = 57237504.

The previous prime is 266307683. The next prime is 266307733. The reversal of 266307720 is 27703662.

266307720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

266307720 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242212 + ... + 243308.

It is an arithmetic number, because the mean of its divisors is an integer number (5056290).

Almost surely, 2^266307720 is an apocalyptic number.

266307720 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 266307720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485403840).

266307720 is an abundant number, since it is smaller than the sum of its proper divisors (704499960).

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

266307720 is a wasteful number, since it uses less digits than its factorization.

266307720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 266307720 is about 16318.9374654112. The cubic root of 266307720 is about 643.3706607304.

The spelling of 266307720 in words is "two hundred sixty-six million, three hundred seven thousand, seven hundred twenty".