866648559967 has 8 divisors (see below), whose sum is σ = 876936468096. Its totient is φ = 856396687512.

The previous prime is 866648559923. The next prime is 866648559977. The reversal of 866648559967 is 769955846668.

866648559967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866648559967 - 2¹⁹ = 866648035679 is a prime.

It is a super-3 number, since 3×866648559967³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866648559977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8960533 + ... + 9056734.

It is an arithmetic number, because the mean of its divisors is an integer number (109617058512).

Almost surely, 2^866648559967 is an apocalyptic number.

866648559967 is a deficient number, since it is larger than the sum of its proper divisors (10287908129).

866648559967 is a wasteful number, since it uses less digits than its factorization.

866648559967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18017837.

The product of its digits is 4702924800, while the sum is 79.

The spelling of 866648559967 in words is "eight hundred sixty-six billion, six hundred forty-eight million, five hundred fifty-nine thousand, nine hundred sixty-seven".