866468047842 has 24 divisors (see below), whose sum is σ = 1890853539120. Its totient is φ = 286744820760.

The previous prime is 866468047811. The next prime is 866468047889. The reversal of 866468047842 is 248740864668.

866468047842 is a `hidden beast` number, since 8 + 6 + 6 + 46 + 80 + 478 + 42 = 666.

It is a super-3 number, since 3×866468047842³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 866468047842.

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, 173152584 + ... + 173157587.

It is an arithmetic number, because the mean of its divisors is an integer number (78785564130).

Almost surely, 2^866468047842 is an apocalyptic number.

866468047842 is an abundant number, since it is smaller than the sum of its proper divisors (1024385491278).

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

866468047842 is a wasteful number, since it uses less digits than its factorization.

866468047842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346310318 (or 346310315 counting only the distinct ones).

The product of its (nonzero) digits is 99090432, while the sum is 63.

The spelling of 866468047842 in words is "eight hundred sixty-six billion, four hundred sixty-eight million, forty-seven thousand, eight hundred forty-two".