66750506710799 has 2 divisors, whose sum is σ = 66750506710800. Its totient is φ = 66750506710798.

The previous prime is 66750506710709. The next prime is 66750506710807. The reversal of 66750506710799 is 99701760505766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66750506710799 - 2³² = 66746211743503 is a prime.

It is a super-2 number, since 2×66750506710799² (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 (66750506710709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33375253355399 + 33375253355400.

It is an arithmetic number, because the mean of its divisors is an integer number (33375253355400).

Almost surely, 2^{66750506710799} is an apocalyptic number.

66750506710799 is a deficient number, since it is larger than the sum of its proper divisors (1).

66750506710799 is an equidigital number, since it uses as much as digits as its factorization.

66750506710799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150028200, while the sum is 68.

The spelling of 66750506710799 in words is "sixty-six trillion, seven hundred fifty billion, five hundred six million, seven hundred ten thousand, seven hundred ninety-nine".