9906778275827 has 2 divisors, whose sum is σ = 9906778275828. Its totient is φ = 9906778275826.

The previous prime is 9906778275817. The next prime is 9906778275887. The reversal of 9906778275827 is 7285728776099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9906778275827 - 2⁶ = 9906778275763 is a prime.

It is not a weakly prime, because it can be changed into another prime (9906778275817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4953389137913 + 4953389137914.

It is an arithmetic number, because the mean of its divisors is an integer number (4953389137914).

Almost surely, 2^{9906778275827} is an apocalyptic number.

9906778275827 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906778275827 is an equidigital number, since it uses as much as digits as its factorization.

9906778275827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1493614080, while the sum is 77.

The spelling of 9906778275827 in words is "nine trillion, nine hundred six billion, seven hundred seventy-eight million, two hundred seventy-five thousand, eight hundred twenty-seven".