866472650681672 has 128 divisors (see below), whose sum is σ = 1748561556672000. Its totient is φ = 401234566348800.

The previous prime is 866472650681669. The next prime is 866472650681731. The reversal of 866472650681672 is 276186056274668.

It is a self number, because there is not a number n which added to its sum of digits gives 866472650681672.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37625271854 + ... + 37625294882.

It is an arithmetic number, because the mean of its divisors is an integer number (13660637161500).

Almost surely, 2^{866472650681672} is an apocalyptic number.

It is an amenable number.

866472650681672 is an abundant number, since it is smaller than the sum of its proper divisors (882088905990328).

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

866472650681672 is a wasteful number, since it uses less digits than its factorization.

866472650681672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28999 (or 28995 counting only the distinct ones).

The product of its (nonzero) digits is 1950842880, while the sum is 74.

The spelling of 866472650681672 in words is "eight hundred sixty-six trillion, four hundred seventy-two billion, six hundred fifty million, six hundred eighty-one thousand, six hundred seventy-two".