11066700721 has 2 divisors, whose sum is σ = 11066700722. Its totient is φ = 11066700720.

The previous prime is 11066700713. The next prime is 11066700751. The reversal of 11066700721 is 12700766011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7151070096 + 3915630625 = 84564^2 + 62575^2 .

It is a cyclic number.

It is not a de Polignac number, because 11066700721 - 2³ = 11066700713 is a prime.

It is not a weakly prime, because it can be changed into another prime (11066700751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5533350360 + 5533350361.

It is an arithmetic number, because the mean of its divisors is an integer number (5533350361).

Almost surely, 2^11066700721 is an apocalyptic number.

It is an amenable number.

11066700721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11066700721 is an equidigital number, since it uses as much as digits as its factorization.

11066700721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 11066700721 in words is "eleven billion, sixty-six million, seven hundred thousand, seven hundred twenty-one".