266957590820 has 12 divisors (see below), whose sum is σ = 560610940764. Its totient is φ = 106783036320.

The previous prime is 266957590813. The next prime is 266957590931. The reversal of 266957590820 is 28095759662.

266957590820 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 2 ways, for example, as 39197664256 + 227759926564 = 197984^2 + 477242^2 .

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 266957590820.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6673939751 + ... + 6673939790.

It is an arithmetic number, because the mean of its divisors is an integer number (46717578397).

Almost surely, 2^266957590820 is an apocalyptic number.

266957590820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266957590820 is an abundant number, since it is smaller than the sum of its proper divisors (293653349944).

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

266957590820 is a wasteful number, since it uses less digits than its factorization.

266957590820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13347879550 (or 13347879548 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 266957590820 in words is "two hundred sixty-six billion, nine hundred fifty-seven million, five hundred ninety thousand, eight hundred twenty".