66280000667 has 2 divisors, whose sum is σ = 66280000668. Its totient is φ = 66280000666.

The previous prime is 66280000651. The next prime is 66280000693. The reversal of 66280000667 is 76600008266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66280000667 - 2⁴ = 66280000651 is a prime.

It is not a weakly prime, because it can be changed into another prime (66280000637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33140000333 + 33140000334.

It is an arithmetic number, because the mean of its divisors is an integer number (33140000334).

Almost surely, 2^66280000667 is an apocalyptic number.

66280000667 is a deficient number, since it is larger than the sum of its proper divisors (1).

66280000667 is an equidigital number, since it uses as much as digits as its factorization.

66280000667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 66280000667 in words is "sixty-six billion, two hundred eighty million, six hundred sixty-seven", and thus it is an aban number.