866278347064 has 16 divisors (see below), whose sum is σ = 1749215893320. Its totient is φ = 399820775520.

The previous prime is 866278347041. The next prime is 866278347113. The reversal of 866278347064 is 460743872668.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 866278346993 and 866278347011.

It is a congruent number.

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, 4164799642 + ... + 4164799849.

Almost surely, 2^866278347064 is an apocalyptic number.

It is an amenable number.

866278347064 is an abundant number, since it is smaller than the sum of its proper divisors (882937546256).

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

866278347064 is a wasteful number, since it uses less digits than its factorization.

866278347064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8329599510 (or 8329599506 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 61.

The spelling of 866278347064 in words is "eight hundred sixty-six billion, two hundred seventy-eight million, three hundred forty-seven thousand, sixty-four".