681660627500 has 60 divisors (see below), whose sum is σ = 1538741295168. Its totient is φ = 263868600000.

The previous prime is 681660627497. The next prime is 681660627577. The reversal of 681660627500 is 5726066186.

It is a super-2 number, since 2×681660627500² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4320311 + ... + 4475310.

Almost surely, 2^681660627500 is an apocalyptic number.

It is an amenable number.

681660627500 is an abundant number, since it is smaller than the sum of its proper divisors (857080667668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681660627500 is a wasteful number, since it uses less digits than its factorization.

681660627500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8795676 (or 8795659 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 681660627500 in words is "six hundred eighty-one billion, six hundred sixty million, six hundred twenty-seven thousand, five hundred".