866718846 has 64 divisors (see below), whose sum is σ = 2226009600. Its totient is φ = 244842048.

The previous prime is 866718833. The next prime is 866718847. The reversal of 866718846 is 648817668.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 866718792 and 866718801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866718847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20761 + ... + 46523.

It is an arithmetic number, because the mean of its divisors is an integer number (34781400).

Almost surely, 2^866718846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866718846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113004800).

866718846 is an abundant number, since it is smaller than the sum of its proper divisors (1359290754).

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

866718846 is a wasteful number, since it uses less digits than its factorization.

866718846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25870 (or 25864 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 866718846 is about 29440.0890963326. The cubic root of 866718846 is about 953.4386357620.

The spelling of 866718846 in words is "eight hundred sixty-six million, seven hundred eighteen thousand, eight hundred forty-six".