866539846 has 16 divisors (see below), whose sum is σ = 1329739776. Its totient is φ = 423324936.

The previous prime is 866539823. The next prime is 866539847. The reversal of 866539846 is 648935668.

It is a happy number.

866539846 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866539847) 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, 49465 + ... + 64651.

It is an arithmetic number, because the mean of its divisors is an integer number (83108736).

Almost surely, 2^866539846 is an apocalyptic number.

866539846 is a deficient number, since it is larger than the sum of its proper divisors (463199930).

866539846 is a wasteful number, since it uses less digits than its factorization.

866539846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15843.

The product of its digits is 7464960, while the sum is 55.

The square root of 866539846 is about 29437.0488670315. The cubic root of 866539846 is about 953.3729946117.

The spelling of 866539846 in words is "eight hundred sixty-six million, five hundred thirty-nine thousand, eight hundred forty-six".