667705377071 has 2 divisors, whose sum is σ = 667705377072. Its totient is φ = 667705377070.

The previous prime is 667705377067. The next prime is 667705377089. The reversal of 667705377071 is 170773507766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667705377071 - 2² = 667705377067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667705376998 and 667705377016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667705377671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333852688535 + 333852688536.

It is an arithmetic number, because the mean of its divisors is an integer number (333852688536).

Almost surely, 2^667705377071 is an apocalyptic number.

667705377071 is a deficient number, since it is larger than the sum of its proper divisors (1).

667705377071 is an equidigital number, since it uses as much as digits as its factorization.

667705377071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9075780, while the sum is 56.

The spelling of 667705377071 in words is "six hundred sixty-seven billion, seven hundred five million, three hundred seventy-seven thousand, seventy-one".