266281366696900 has 81 divisors (see below), whose sum is σ = 613826407490709. Its totient is φ = 100246058396160.

The previous prime is 266281366696867. The next prime is 266281366696903. The reversal of 266281366696900 is 9696663182662.

The square root of 266281366696900 is 16318130.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 213677562585796 + 52603804111104 = 14617714^2 + 7252848^2 .

It is a super-2 number, since 2×266281366696900² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266281366696900.

It is not an unprimeable number, because it can be changed into a prime (266281366696903) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2774034106 + ... + 2774130094.

Almost surely, 2^{266281366696900} is an apocalyptic number.

266281366696900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

266281366696900 is the 16318130-th square number.

It is an amenable number.

266281366696900 is an abundant number, since it is smaller than the sum of its proper divisors (347545040793809).

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

266281366696900 is an frugal number, since it uses more digits than its factorization.

266281366696900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192026 (or 96013 counting only the distinct ones).

The product of its (nonzero) digits is 362797056, while the sum is 70.

The spelling of 266281366696900 in words is "two hundred sixty-six trillion, two hundred eighty-one billion, three hundred sixty-six million, six hundred ninety-six thousand, nine hundred".