866126476441764 has 240 divisors, whose sum is σ = 2293717962412800. Its totient is φ = 284979859766784.

The previous prime is 866126476441753. The next prime is 866126476441781. The reversal of 866126476441764 is 467144674621668.

866126476441764 is a `hidden beast` number, since 8 + 6 + 61 + 2 + 64 + 7 + 6 + 441 + 7 + 64 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 866126476441692 and 866126476441701.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4338406954 + ... + 4338606590.

It is an arithmetic number, because the mean of its divisors is an integer number (9557158176720).

Almost surely, 2^{866126476441764} 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 866126476441764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146858981206400).

866126476441764 is an abundant number, since it is smaller than the sum of its proper divisors (1427591485971036).

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

866126476441764 is a wasteful number, since it uses less digits than its factorization.

866126476441764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200384 (or 200373 counting only the distinct ones).

The product of its digits is 1560674304, while the sum is 72.

The spelling of 866126476441764 in words is "eight hundred sixty-six trillion, one hundred twenty-six billion, four hundred seventy-six million, four hundred forty-one thousand, seven hundred sixty-four".