266306720 has 24 divisors (see below), whose sum is σ = 629150004. Its totient is φ = 106522624.

The previous prime is 266306659. The next prime is 266306731. The reversal of 266306720 is 27603662.

It can be written as a sum of positive squares in 2 ways, for example, as 266211856 + 94864 = 16316^2 + 308^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832049 + ... + 832368.

Almost surely, 2^266306720 is an apocalyptic number.

266306720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266306720 is an abundant number, since it is smaller than the sum of its proper divisors (362843284).

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

266306720 is a wasteful number, since it uses less digits than its factorization.

266306720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664432 (or 1664424 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 266306720 is about 16318.9068261327. The cubic root of 266306720 is about 643.3698554321.

The spelling of 266306720 in words is "two hundred sixty-six million, three hundred six thousand, seven hundred twenty".