66386733768347 has 2 divisors, whose sum is σ = 66386733768348. Its totient is φ = 66386733768346.

The previous prime is 66386733768331. The next prime is 66386733768373. The reversal of 66386733768347 is 74386733768366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66386733768347 - 2⁴ = 66386733768331 is a prime.

It is a super-2 number, since 2×66386733768347² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66386733768317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33193366884173 + 33193366884174.

It is an arithmetic number, because the mean of its divisors is an integer number (33193366884174).

Almost surely, 2^{66386733768347} is an apocalyptic number.

66386733768347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66386733768347 is an equidigital number, since it uses as much as digits as its factorization.

66386733768347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9217732608, while the sum is 77.

The spelling of 66386733768347 in words is "sixty-six trillion, three hundred eighty-six billion, seven hundred thirty-three million, seven hundred sixty-eight thousand, three hundred forty-seven".