66307142513 has 2 divisors, whose sum is σ = 66307142514. Its totient is φ = 66307142512.

The previous prime is 66307142477. The next prime is 66307142527. The reversal of 66307142513 is 31524170366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66140009329 + 167133184 = 257177^2 + 12928^2 .

It is a cyclic number.

It is not a de Polignac number, because 66307142513 - 2¹⁸ = 66306880369 is a prime.

It is not a weakly prime, because it can be changed into another prime (66307142113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33153571256 + 33153571257.

It is an arithmetic number, because the mean of its divisors is an integer number (33153571257).

Almost surely, 2^66307142513 is an apocalyptic number.

It is an amenable number.

66307142513 is a deficient number, since it is larger than the sum of its proper divisors (1).

66307142513 is an equidigital number, since it uses as much as digits as its factorization.

66307142513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 66307142513 in words is "sixty-six billion, three hundred seven million, one hundred forty-two thousand, five hundred thirteen".