687762660613 has 8 divisors (see below), whose sum is σ = 787095650432. Its totient is φ = 588699966096.

The previous prime is 687762660523. The next prime is 687762660623. The reversal of 687762660613 is 316066267786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687762660613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687762660623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67568370 + ... + 67578547.

It is an arithmetic number, because the mean of its divisors is an integer number (98386956304).

Almost surely, 2^687762660613 is an apocalyptic number.

It is an amenable number.

687762660613 is a deficient number, since it is larger than the sum of its proper divisors (99332989819).

687762660613 is a wasteful number, since it uses less digits than its factorization.

687762660613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135147651.

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 687762660613 in words is "six hundred eighty-seven billion, seven hundred sixty-two million, six hundred sixty thousand, six hundred thirteen".