681468066808 has 16 divisors (see below), whose sum is σ = 1278816550560. Its totient is φ = 340450320000.

The previous prime is 681468066793. The next prime is 681468066827. The reversal of 681468066808 is 808660864186.

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, 35453968 + ... + 35473183.

It is an arithmetic number, because the mean of its divisors is an integer number (79926034410).

Almost surely, 2^681468066808 is an apocalyptic number.

It is an amenable number.

681468066808 is a deficient number, since it is larger than the sum of its proper divisors (597348483752).

681468066808 is a wasteful number, since it uses less digits than its factorization.

681468066808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70928358 (or 70928354 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 61.

The spelling of 681468066808 in words is "six hundred eighty-one billion, four hundred sixty-eight million, sixty-six thousand, eight hundred eight".