66107565708047 has 2 divisors, whose sum is σ = 66107565708048. Its totient is φ = 66107565708046.

The previous prime is 66107565708029. The next prime is 66107565708089. The reversal of 66107565708047 is 74080756570166.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66107565708047 - 2¹⁰ = 66107565707023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66107565708007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33053782854023 + 33053782854024.

It is an arithmetic number, because the mean of its divisors is an integer number (33053782854024).

Almost surely, 2^{66107565708047} is an apocalyptic number.

66107565708047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66107565708047 is an equidigital number, since it uses as much as digits as its factorization.

66107565708047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59270400, while the sum is 62.

The spelling of 66107565708047 in words is "sixty-six trillion, one hundred seven billion, five hundred sixty-five million, seven hundred eight thousand, forty-seven".