7266836736221 has 2 divisors, whose sum is σ = 7266836736222. Its totient is φ = 7266836736220.

The previous prime is 7266836736197. The next prime is 7266836736223. The reversal of 7266836736221 is 1226376386627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4713197580100 + 2553639156121 = 2170990^2 + 1598011^2 .

It is a cyclic number.

It is not a de Polignac number, because 7266836736221 - 2⁶ = 7266836736157 is a prime.

Together with 7266836736223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7266836736223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3633418368110 + 3633418368111.

It is an arithmetic number, because the mean of its divisors is an integer number (3633418368111).

Almost surely, 2^{7266836736221} is an apocalyptic number.

It is an amenable number.

7266836736221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7266836736221 is an equidigital number, since it uses as much as digits as its factorization.

7266836736221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 59.

The spelling of 7266836736221 in words is "seven trillion, two hundred sixty-six billion, eight hundred thirty-six million, seven hundred thirty-six thousand, two hundred twenty-one".