866001718900 has 18 divisors (see below), whose sum is σ = 1879223730230. Its totient is φ = 346400687520.

The previous prime is 866001718861. The next prime is 866001718949. The reversal of 866001718900 is 9817100668.

866001718900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 116589468304 + 749412250596 = 341452^2 + 865686^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4330008495 + ... + 4330008694.

Almost surely, 2^866001718900 is an apocalyptic number.

It is an amenable number.

866001718900 is an abundant number, since it is smaller than the sum of its proper divisors (1013222011330).

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

866001718900 is a wasteful number, since it uses less digits than its factorization.

866001718900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8660017203 (or 8660017196 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 866001718900 in words is "eight hundred sixty-six billion, one million, seven hundred eighteen thousand, nine hundred".