66420071373347 has 2 divisors, whose sum is σ = 66420071373348. Its totient is φ = 66420071373346.

The previous prime is 66420071373329. The next prime is 66420071373367. The reversal of 66420071373347 is 74337317002466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66420071373347 - 2⁸ = 66420071373091 is a prime.

It is not a weakly prime, because it can be changed into another prime (66420071373367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33210035686673 + 33210035686674.

It is an arithmetic number, because the mean of its divisors is an integer number (33210035686674).

Almost surely, 2^{66420071373347} is an apocalyptic number.

66420071373347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66420071373347 is an equidigital number, since it uses as much as digits as its factorization.

66420071373347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10668672, while the sum is 53.

The spelling of 66420071373347 in words is "sixty-six trillion, four hundred twenty billion, seventy-one million, three hundred seventy-three thousand, three hundred forty-seven".