66042893706431 has 2 divisors, whose sum is σ = 66042893706432. Its totient is φ = 66042893706430.

The previous prime is 66042893706407. The next prime is 66042893706451. The reversal of 66042893706431 is 13460739824066.

66042893706431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66042893706431 - 2¹⁰ = 66042893705407 is a prime.

It is a super-2 number, since 2×66042893706431² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66042893706451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33021446853215 + 33021446853216.

It is an arithmetic number, because the mean of its divisors is an integer number (33021446853216).

Almost surely, 2^{66042893706431} is an apocalyptic number.

66042893706431 is a deficient number, since it is larger than the sum of its proper divisors (1).

66042893706431 is an equidigital number, since it uses as much as digits as its factorization.

66042893706431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 59.

The spelling of 66042893706431 in words is "sixty-six trillion, forty-two billion, eight hundred ninety-three million, seven hundred six thousand, four hundred thirty-one".