667108265687 has 2 divisors, whose sum is σ = 667108265688. Its totient is φ = 667108265686.

The previous prime is 667108265627. The next prime is 667108265711. The reversal of 667108265687 is 786562801766.

667108265687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667108265687 - 2¹⁸ = 667108003543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667108265627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333554132843 + 333554132844.

It is an arithmetic number, because the mean of its divisors is an integer number (333554132844).

Almost surely, 2^667108265687 is an apocalyptic number.

667108265687 is a deficient number, since it is larger than the sum of its proper divisors (1).

667108265687 is an equidigital number, since it uses as much as digits as its factorization.

667108265687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 667108265687 in words is "six hundred sixty-seven billion, one hundred eight million, two hundred sixty-five thousand, six hundred eighty-seven".