687669707476503 has 48 divisors (see below), whose sum is σ = 1046053560277440. Its totient is φ = 434467348204032.

The previous prime is 687669707476481. The next prime is 687669707476547. The reversal of 687669707476503 is 305674707966786.

687669707476503 is a `hidden beast` number, since 6 + 8 + 7 + 6 + 6 + 97 + 0 + 7 + 476 + 50 + 3 = 666.

It is not a de Polignac number, because 687669707476503 - 2⁵ = 687669707476471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687669707476553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 419236825 + ... + 420873917.

It is an arithmetic number, because the mean of its divisors is an integer number (21792782505780).

Almost surely, 2^{687669707476503} is an apocalyptic number.

687669707476503 is a deficient number, since it is larger than the sum of its proper divisors (358383852800937).

687669707476503 is a wasteful number, since it uses less digits than its factorization.

687669707476503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655848 (or 1655845 counting only the distinct ones).

The product of its (nonzero) digits is 13442526720, while the sum is 81.

The spelling of 687669707476503 in words is "six hundred eighty-seven trillion, six hundred sixty-nine billion, seven hundred seven million, four hundred seventy-six thousand, five hundred three".