866126476616841 has 48 divisors (see below), whose sum is σ = 1370408383536192. Its totient is φ = 522770632560000.

The previous prime is 866126476616833. The next prime is 866126476616881. The reversal of 866126476616841 is 148616674621668.

866126476616841 is a `hidden beast` number, since 8 + 6 + 6 + 12 + 6 + 476 + 61 + 6 + 84 + 1 = 666.

It is not a de Polignac number, because 866126476616841 - 2³ = 866126476616833 is a prime.

It is a super-3 number, since 3×866126476616841³ (a number of 46 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866126476616841.

It is not an unprimeable number, because it can be changed into a prime (866126476616881) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 203971251 + ... + 208174263.

It is an arithmetic number, because the mean of its divisors is an integer number (28550174657004).

Almost surely, 2^{866126476616841} is an apocalyptic number.

It is an amenable number.

866126476616841 is a deficient number, since it is larger than the sum of its proper divisors (504281906919351).

866126476616841 is a wasteful number, since it uses less digits than its factorization.

866126476616841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211574 (or 4211571 counting only the distinct ones).

The product of its digits is 668860416, while the sum is 72.

The spelling of 866126476616841 in words is "eight hundred sixty-six trillion, one hundred twenty-six billion, four hundred seventy-six million, six hundred sixteen thousand, eight hundred forty-one".