66617313047 has 2 divisors, whose sum is σ = 66617313048. Its totient is φ = 66617313046.

The previous prime is 66617312977. The next prime is 66617313079. The reversal of 66617313047 is 74031371666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66617313047 - 2¹⁴ = 66617296663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66617312989 and 66617313007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66617313947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33308656523 + 33308656524.

It is an arithmetic number, because the mean of its divisors is an integer number (33308656524).

Almost surely, 2^66617313047 is an apocalyptic number.

66617313047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66617313047 is an equidigital number, since it uses as much as digits as its factorization.

66617313047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 66617313047 in words is "sixty-six billion, six hundred seventeen million, three hundred thirteen thousand, forty-seven".