66746814413 has 2 divisors, whose sum is σ = 66746814414. Its totient is φ = 66746814412.

The previous prime is 66746814391. The next prime is 66746814467. The reversal of 66746814413 is 31441864766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61902932809 + 4843881604 = 248803^2 + 69598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66746814413 is a prime.

It is a super-3 number, since 3×66746814413³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66746874413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33373407206 + 33373407207.

It is an arithmetic number, because the mean of its divisors is an integer number (33373407207).

Almost surely, 2^66746814413 is an apocalyptic number.

It is an amenable number.

66746814413 is a deficient number, since it is larger than the sum of its proper divisors (1).

66746814413 is an equidigital number, since it uses as much as digits as its factorization.

66746814413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 50.

The spelling of 66746814413 in words is "sixty-six billion, seven hundred forty-six million, eight hundred fourteen thousand, four hundred thirteen".