866989668 has 24 divisors (see below), whose sum is σ = 2033147200. Its totient is φ = 287543520.

The previous prime is 866989657. The next prime is 866989691.

866989668 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 866989599 and 866989608.

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, 179143 + ... + 183918.

Almost surely, 2^866989668 is an apocalyptic number.

It is an amenable number.

866989668 is an abundant number, since it is smaller than the sum of its proper divisors (1166157532).

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

866989668 is a wasteful number, since it uses less digits than its factorization.

866989668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363267 (or 363265 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 66.

The square root of 866989668 is about 29444.6882815899. The cubic root of 866989668 is about 953.5379318100.

The spelling of 866989668 in words is "eight hundred sixty-six million, nine hundred eighty-nine thousand, six hundred sixty-eight".