266052321145321 has 4 divisors (see below), whose sum is σ = 271713008829312. Its totient is φ = 260391633461332.

The previous prime is 266052321145271. The next prime is 266052321145327. The reversal of 266052321145321 is 123541123250662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266052321145321 - 2¹³ = 266052321137129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266052321145327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2830343841925 + ... + 2830343842018.

It is an arithmetic number, because the mean of its divisors is an integer number (67928252207328).

Almost surely, 2^{266052321145321} is an apocalyptic number.

It is an amenable number.

266052321145321 is a deficient number, since it is larger than the sum of its proper divisors (5660687683991).

266052321145321 is an equidigital number, since it uses as much as digits as its factorization.

266052321145321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660687683990.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 266052321145321 its reverse (123541123250662), we get a palindrome (389593444395983).

The spelling of 266052321145321 in words is "two hundred sixty-six trillion, fifty-two billion, three hundred twenty-one million, one hundred forty-five thousand, three hundred twenty-one".