667420686139 has 2 divisors, whose sum is σ = 667420686140. Its totient is φ = 667420686138.

The previous prime is 667420686133. The next prime is 667420686167. The reversal of 667420686139 is 931686024766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667420686139 - 2³ = 667420686131 is a prime.

It is not a weakly prime, because it can be changed into another prime (667420686131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333710343069 + 333710343070.

It is an arithmetic number, because the mean of its divisors is an integer number (333710343070).

Almost surely, 2^667420686139 is an apocalyptic number.

667420686139 is a deficient number, since it is larger than the sum of its proper divisors (1).

667420686139 is an equidigital number, since it uses as much as digits as its factorization.

667420686139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 58.

The spelling of 667420686139 in words is "six hundred sixty-seven billion, four hundred twenty million, six hundred eighty-six thousand, one hundred thirty-nine".