866768610461720 has 64 divisors (see below), whose sum is σ = 1950868505570400. Its totient is φ = 346593826022400.

The previous prime is 866768610461671. The next prime is 866768610461777. The reversal of 866768610461720 is 27164016867668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9820694951 + ... + 9820783209.

Almost surely, 2^{866768610461720} is an apocalyptic number.

It is an amenable number.

866768610461720 is an abundant number, since it is smaller than the sum of its proper divisors (1084099895108680).

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

866768610461720 is a wasteful number, since it uses less digits than its factorization.

866768610461720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165948 (or 165944 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 68.

The spelling of 866768610461720 in words is "eight hundred sixty-six trillion, seven hundred sixty-eight billion, six hundred ten million, four hundred sixty-one thousand, seven hundred twenty".