66567146069 has 2 divisors, whose sum is σ = 66567146070. Its totient is φ = 66567146068.

The previous prime is 66567146059. The next prime is 66567146081. The reversal of 66567146069 is 96064176566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61286943844 + 5280202225 = 247562^2 + 72665^2 .

It is a cyclic number.

It is not a de Polignac number, because 66567146069 - 2⁴ = 66567146053 is a prime.

It is a super-2 number, since 2×66567146069² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66567146039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33283573034 + 33283573035.

It is an arithmetic number, because the mean of its divisors is an integer number (33283573035).

Almost surely, 2^66567146069 is an apocalyptic number.

It is an amenable number.

66567146069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66567146069 is an equidigital number, since it uses as much as digits as its factorization.

66567146069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 66567146069 in words is "sixty-six billion, five hundred sixty-seven million, one hundred forty-six thousand, sixty-nine".