686790669766 has 8 divisors (see below), whose sum is σ = 1030616511624. Its totient is φ = 343251832560.

The previous prime is 686790669739. The next prime is 686790669787. The reversal of 686790669766 is 667966097686.

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

It is a junction number, because it is equal to n+sod(n) for n = 686790669692 and 686790669701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71745180 + ... + 71754751.

It is an arithmetic number, because the mean of its divisors is an integer number (128827063953).

Almost surely, 2^686790669766 is an apocalyptic number.

686790669766 is a deficient number, since it is larger than the sum of its proper divisors (343825841858).

686790669766 is a wasteful number, since it uses less digits than its factorization.

686790669766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143502326.

The product of its (nonzero) digits is 1481421312, while the sum is 76.

The spelling of 686790669766 in words is "six hundred eighty-six billion, seven hundred ninety million, six hundred sixty-nine thousand, seven hundred sixty-six".