66165811307 has 2 divisors, whose sum is σ = 66165811308. Its totient is φ = 66165811306.

The previous prime is 66165811297. The next prime is 66165811351. The reversal of 66165811307 is 70311856166.

It is an a-pointer prime, because the next prime (66165811351) can be obtained adding 66165811307 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66165811307 - 2¹⁰ = 66165810283 is a prime.

It is not a weakly prime, because it can be changed into another prime (66165811007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33082905653 + 33082905654.

It is an arithmetic number, because the mean of its divisors is an integer number (33082905654).

Almost surely, 2^66165811307 is an apocalyptic number.

66165811307 is a deficient number, since it is larger than the sum of its proper divisors (1).

66165811307 is an equidigital number, since it uses as much as digits as its factorization.

66165811307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 66165811307 in words is "sixty-six billion, one hundred sixty-five million, eight hundred eleven thousand, three hundred seven".