266737129156 has 9 divisors (see below), whose sum is σ = 466791783661. Its totient is φ = 133368048112.

The previous prime is 266737129129. The next prime is 266737129159. The reversal of 266737129156 is 651921737662.

It is a happy number.

The square root of 266737129156 is 516466.

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

266737129156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 266039324100 + 697805056 = 515790^2 + 26416^2 .

It is a super-2 number, since 2×266737129156² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266737129097 and 266737129106.

It is not an unprimeable number, because it can be changed into a prime (266737129159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 903816 + ... + 1162048.

Almost surely, 2^266737129156 is an apocalyptic number.

266737129156 is the 516466-th square number.

It is an amenable number.

266737129156 is a deficient number, since it is larger than the sum of its proper divisors (200054654505).

266737129156 is an frugal number, since it uses more digits than its factorization.

266737129156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516470 (or 258235 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 55.

The spelling of 266737129156 in words is "two hundred sixty-six billion, seven hundred thirty-seven million, one hundred twenty-nine thousand, one hundred fifty-six".