866706726426 has 16 divisors (see below), whose sum is σ = 1773725394144. Its totient is φ = 282183585264.

The previous prime is 866706726397. The next prime is 866706726433. The reversal of 866706726426 is 624627607668.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 866706726426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1679663941 + ... + 1679664456.

It is an arithmetic number, because the mean of its divisors is an integer number (110857837134).

Almost surely, 2^866706726426 is an apocalyptic number.

866706726426 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

866706726426 is an abundant number, since it is smaller than the sum of its proper divisors (907018667718).

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

866706726426 is a wasteful number, since it uses less digits than its factorization.

866706726426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359328445.

The product of its (nonzero) digits is 48771072, while the sum is 60.

The spelling of 866706726426 in words is "eight hundred sixty-six billion, seven hundred six million, seven hundred twenty-six thousand, four hundred twenty-six".