687685676675603 has 2 divisors, whose sum is σ = 687685676675604. Its totient is φ = 687685676675602.

The previous prime is 687685676675579. The next prime is 687685676675717. The reversal of 687685676675603 is 306576676586786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687685676675603 - 2⁶ = 687685676675539 is a prime.

It is not a weakly prime, because it can be changed into another prime (687685676695603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343842838337801 + 343842838337802.

It is an arithmetic number, because the mean of its divisors is an integer number (343842838337802).

Almost surely, 2^{687685676675603} is an apocalyptic number.

687685676675603 is a deficient number, since it is larger than the sum of its proper divisors (1).

687685676675603 is an equidigital number, since it uses as much as digits as its factorization.

687685676675603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76814438400, while the sum is 86.

The spelling of 687685676675603 in words is "six hundred eighty-seven trillion, six hundred eighty-five billion, six hundred seventy-six million, six hundred seventy-five thousand, six hundred three".