266397716 has 24 divisors (see below), whose sum is σ = 511535304. Its totient is φ = 120631680.

The previous prime is 266397709. The next prime is 266397731. The reversal of 266397716 is 617793662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 67305616 + 199092100 = 8204^2 + 14110^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45575 + ... + 51086.

It is an arithmetic number, because the mean of its divisors is an integer number (21313971).

Almost surely, 2^266397716 is an apocalyptic number.

266397716 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

266397716 is a deficient number, since it is larger than the sum of its proper divisors (245137588).

266397716 is a wasteful number, since it uses less digits than its factorization.

266397716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96731 (or 96729 counting only the distinct ones).

The product of its digits is 571536, while the sum is 47.

The square root of 266397716 is about 16321.6946424077. The cubic root of 266397716 is about 643.4431261035.

The spelling of 266397716 in words is "two hundred sixty-six million, three hundred ninety-seven thousand, seven hundred sixteen".