866749947668 has 36 divisors (see below), whose sum is σ = 1667675274720. Its totient is φ = 393874411920.

The previous prime is 866749947607. The next prime is 866749947671.

866749947668 is nontrivially palindromic in base 10.

866749947668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 866749947592 and 866749947601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1637903 + ... + 2101481.

Almost surely, 2^866749947668 is an apocalyptic number.

It is an amenable number.

866749947668 is a deficient number, since it is larger than the sum of its proper divisors (800925327052).

866749947668 is a wasteful number, since it uses less digits than its factorization.

866749947668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467468 (or 467455 counting only the distinct ones).

The product of its digits is 5267275776, while the sum is 80.

The spelling of 866749947668 in words is "eight hundred sixty-six billion, seven hundred forty-nine million, nine hundred forty-seven thousand, six hundred sixty-eight".