66230042993 has 2 divisors, whose sum is σ = 66230042994. Its totient is φ = 66230042992.

The previous prime is 66230042971. The next prime is 66230043013. The reversal of 66230042993 is 39924003266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55647394609 + 10582648384 = 235897^2 + 102872^2 .

It is a cyclic number.

It is not a de Polignac number, because 66230042993 - 2⁶ = 66230042929 is a prime.

It is not a weakly prime, because it can be changed into another prime (66230042953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33115021496 + 33115021497.

It is an arithmetic number, because the mean of its divisors is an integer number (33115021497).

Almost surely, 2^66230042993 is an apocalyptic number.

It is an amenable number.

66230042993 is a deficient number, since it is larger than the sum of its proper divisors (1).

66230042993 is an equidigital number, since it uses as much as digits as its factorization.

66230042993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 66230042993 in words is "sixty-six billion, two hundred thirty million, forty-two thousand, nine hundred ninety-three".