8125861806660 has 192 divisors, whose sum is σ = 27071925898752. Its totient is φ = 1800702418944.

The previous prime is 8125861806613. The next prime is 8125861806707. The reversal of 8125861806660 is 666081685218.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8125861806613) and next prime (8125861806707).

It is a self number, because there is not a number n which added to its sum of digits gives 8125861806660.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13016979 + ... + 13626938.

It is an arithmetic number, because the mean of its divisors is an integer number (140999614056).

Almost surely, 2^{8125861806660} is an apocalyptic number.

It is an amenable number.

8125861806660 is an abundant number, since it is smaller than the sum of its proper divisors (18946064092092).

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

8125861806660 is a wasteful number, since it uses less digits than its factorization.

8125861806660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26643982 (or 26643980 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 57.

The spelling of 8125861806660 in words is "eight trillion, one hundred twenty-five billion, eight hundred sixty-one million, eight hundred six thousand, six hundred sixty".