66710337667 has 2 divisors, whose sum is σ = 66710337668. Its totient is φ = 66710337666.

The previous prime is 66710337637. The next prime is 66710337779. The reversal of 66710337667 is 76673301766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66710337667 - 2⁷ = 66710337539 is a prime.

It is not a weakly prime, because it can be changed into another prime (66710337607) 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, 33355168833 + 33355168834.

It is an arithmetic number, because the mean of its divisors is an integer number (33355168834).

Almost surely, 2^66710337667 is an apocalyptic number.

66710337667 is a deficient number, since it is larger than the sum of its proper divisors (1).

66710337667 is an equidigital number, since it uses as much as digits as its factorization.

66710337667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000752, while the sum is 52.

The spelling of 66710337667 in words is "sixty-six billion, seven hundred ten million, three hundred thirty-seven thousand, six hundred sixty-seven".