9661497808327 has 2 divisors, whose sum is σ = 9661497808328. Its totient is φ = 9661497808326.

The previous prime is 9661497808283. The next prime is 9661497808367. The reversal of 9661497808327 is 7238087941669.

It is a happy number.

9661497808327 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9661497808327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9661497808367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830748904163 + 4830748904164.

It is an arithmetic number, because the mean of its divisors is an integer number (4830748904164).

Almost surely, 2^{9661497808327} is an apocalyptic number.

9661497808327 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661497808327 is an equidigital number, since it uses as much as digits as its factorization.

9661497808327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219469824, while the sum is 70.

The spelling of 9661497808327 in words is "nine trillion, six hundred sixty-one billion, four hundred ninety-seven million, eight hundred eight thousand, three hundred twenty-seven".