66800006659 has 2 divisors, whose sum is σ = 66800006660. Its totient is φ = 66800006658.

The previous prime is 66800006657. The next prime is 66800006671. The reversal of 66800006659 is 95660000866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66800006659 - 2¹ = 66800006657 is a prime.

Together with 66800006657, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66800006653) 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, 33400003329 + 33400003330.

It is an arithmetic number, because the mean of its divisors is an integer number (33400003330).

Almost surely, 2^66800006659 is an apocalyptic number.

66800006659 is a deficient number, since it is larger than the sum of its proper divisors (1).

66800006659 is an equidigital number, since it uses as much as digits as its factorization.

66800006659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 66800006659 in words is "sixty-six billion, eight hundred million, six thousand, six hundred fifty-nine".