66164134697 has 2 divisors, whose sum is σ = 66164134698. Its totient is φ = 66164134696.

The previous prime is 66164134643. The next prime is 66164134717. The reversal of 66164134697 is 79643146166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59508675136 + 6655459561 = 243944^2 + 81581^2 .

It is a cyclic number.

It is not a de Polignac number, because 66164134697 - 2⁸ = 66164134441 is a prime.

It is not a weakly prime, because it can be changed into another prime (66164134637) 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, 33082067348 + 33082067349.

It is an arithmetic number, because the mean of its divisors is an integer number (33082067349).

Almost surely, 2^66164134697 is an apocalyptic number.

It is an amenable number.

66164134697 is a deficient number, since it is larger than the sum of its proper divisors (1).

66164134697 is an equidigital number, since it uses as much as digits as its factorization.

66164134697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 53.

The spelling of 66164134697 in words is "sixty-six billion, one hundred sixty-four million, one hundred thirty-four thousand, six hundred ninety-seven".