66452679348641 has 2 divisors, whose sum is σ = 66452679348642. Its totient is φ = 66452679348640.

The previous prime is 66452679348617. The next prime is 66452679348667. The reversal of 66452679348641 is 14684397625466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64468116873616 + 1984562475025 = 8029204^2 + 1408745^2 .

It is a cyclic number.

It is not a de Polignac number, because 66452679348641 - 2³⁴ = 66435499479457 is a prime.

It is a super-2 number, since 2×66452679348641² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66452679348841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33226339674320 + 33226339674321.

It is an arithmetic number, because the mean of its divisors is an integer number (33226339674321).

Almost surely, 2^{66452679348641} is an apocalyptic number.

It is an amenable number.

66452679348641 is a deficient number, since it is larger than the sum of its proper divisors (1).

66452679348641 is an equidigital number, since it uses as much as digits as its factorization.

66452679348641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1254113280, while the sum is 71.

The spelling of 66452679348641 in words is "sixty-six trillion, four hundred fifty-two billion, six hundred seventy-nine million, three hundred forty-eight thousand, six hundred forty-one".