866936194344 has 192 divisors, whose sum is σ = 2569742884800. Its totient is φ = 261854208000.

The previous prime is 866936194343. The next prime is 866936194351. The reversal of 866936194344 is 443491639668.

866936194344 is a `hidden beast` number, since 8 + 6 + 6 + 9 + 3 + 619 + 4 + 3 + 4 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (866936194343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 410285832 + ... + 410287944.

It is an arithmetic number, because the mean of its divisors is an integer number (13384077525).

Almost surely, 2^866936194344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866936194344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284871442400).

866936194344 is an abundant number, since it is smaller than the sum of its proper divisors (1702806690456).

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

866936194344 is a wasteful number, since it uses less digits than its factorization.

866936194344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576 (or 3569 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 63.

The spelling of 866936194344 in words is "eight hundred sixty-six billion, nine hundred thirty-six million, one hundred ninety-four thousand, three hundred forty-four".