866787146664 has 32 divisors (see below), whose sum is σ = 2199310674720. Its totient is φ = 284616674496.

The previous prime is 866787146633. The next prime is 866787146671. The reversal of 866787146664 is 466641787668.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269521759 + ... + 269524974.

It is an arithmetic number, because the mean of its divisors is an integer number (68728458585).

Almost surely, 2^866787146664 is an apocalyptic number.

It is an amenable number.

866787146664 is an abundant number, since it is smaller than the sum of its proper divisors (1332523528056).

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

866787146664 is a wasteful number, since it uses less digits than its factorization.

866787146664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539046809 (or 539046805 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 69.

The spelling of 866787146664 in words is "eight hundred sixty-six billion, seven hundred eighty-seven million, one hundred forty-six thousand, six hundred sixty-four".