6687123713 has 2 divisors, whose sum is σ = 6687123714. Its totient is φ = 6687123712.

The previous prime is 6687123697. The next prime is 6687123721. The reversal of 6687123713 is 3173217866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6685842289 + 1281424 = 81767^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 6687123713 - 2⁴ = 6687123697 is a prime.

It is not a weakly prime, because it can be changed into another prime (6687123733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343561856 + 3343561857.

It is an arithmetic number, because the mean of its divisors is an integer number (3343561857).

Almost surely, 2^6687123713 is an apocalyptic number.

It is an amenable number.

6687123713 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687123713 is an equidigital number, since it uses as much as digits as its factorization.

6687123713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 6687123713 is about 81774.8354507669. The cubic root of 6687123713 is about 1883.9951738021.

The spelling of 6687123713 in words is "six billion, six hundred eighty-seven million, one hundred twenty-three thousand, seven hundred thirteen".