66700464143161 has 2 divisors, whose sum is σ = 66700464143162. Its totient is φ = 66700464143160.

The previous prime is 66700464143119. The next prime is 66700464143207. The reversal of 66700464143161 is 16134146400766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43158133165225 + 23542330977936 = 6569485^2 + 4852044^2 .

It is a cyclic number.

It is not a de Polignac number, because 66700464143161 - 2²⁷ = 66700329925433 is a prime.

It is not a weakly prime, because it can be changed into another prime (66700464443161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350232071580 + 33350232071581.

It is an arithmetic number, because the mean of its divisors is an integer number (33350232071581).

Almost surely, 2^{66700464143161} is an apocalyptic number.

It is an amenable number.

66700464143161 is a deficient number, since it is larger than the sum of its proper divisors (1).

66700464143161 is an equidigital number, since it uses as much as digits as its factorization.

66700464143161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 66700464143161 in words is "sixty-six trillion, seven hundred billion, four hundred sixty-four million, one hundred forty-three thousand, one hundred sixty-one".