866243293768 has 16 divisors (see below), whose sum is σ = 1626351769980. Its totient is φ = 432549488448.

The previous prime is 866243293759. The next prime is 866243293771. The reversal of 866243293768 is 867392342668.

It can be written as a sum of positive squares in 2 ways, for example, as 865982858724 + 260435044 = 930582^2 + 16138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71513371 + ... + 71525482.

Almost surely, 2^866243293768 is an apocalyptic number.

It is an amenable number.

866243293768 is a deficient number, since it is larger than the sum of its proper divisors (760108476212).

866243293768 is a wasteful number, since it uses less digits than its factorization.

866243293768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143039616 (or 143039612 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 64.

The spelling of 866243293768 in words is "eight hundred sixty-six billion, two hundred forty-three million, two hundred ninety-three thousand, seven hundred sixty-eight".