66410842123 has 2 divisors, whose sum is σ = 66410842124. Its totient is φ = 66410842122.

The previous prime is 66410842103. The next prime is 66410842151. The reversal of 66410842123 is 32124801466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66410842123 is a prime.

It is a super-2 number, since 2×66410842123² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66410842103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33205421061 + 33205421062.

It is an arithmetic number, because the mean of its divisors is an integer number (33205421062).

Almost surely, 2^66410842123 is an apocalyptic number.

66410842123 is a deficient number, since it is larger than the sum of its proper divisors (1).

66410842123 is an equidigital number, since it uses as much as digits as its factorization.

66410842123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 66410842123 in words is "sixty-six billion, four hundred ten million, eight hundred forty-two thousand, one hundred twenty-three".