66317306423 has 2 divisors, whose sum is σ = 66317306424. Its totient is φ = 66317306422.

The previous prime is 66317306413. The next prime is 66317306513. The reversal of 66317306423 is 32460371366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66317306423 - 2¹⁰ = 66317305399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66317306413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33158653211 + 33158653212.

It is an arithmetic number, because the mean of its divisors is an integer number (33158653212).

Almost surely, 2^66317306423 is an apocalyptic number.

66317306423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66317306423 is an equidigital number, since it uses as much as digits as its factorization.

66317306423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 41.

Adding to 66317306423 its reverse (32460371366), we get a palindrome (98777677789).

The spelling of 66317306423 in words is "sixty-six billion, three hundred seventeen million, three hundred six thousand, four hundred twenty-three".