866763546746436 has 36 divisors (see below), whose sum is σ = 2191024991665692. Its totient is φ = 288915991970304.

The previous prime is 866763546746393. The next prime is 866763546746437. The reversal of 866763546746436 is 634647645367668.

It is a happy number.

866763546746436 is a `hidden beast` number, since 8 + 6 + 6 + 7 + 6 + 3 + 546 + 7 + 4 + 64 + 3 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 311772120984900 + 554991425761536 = 17657070^2 + 23558256^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×866763546746436² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866763546746437) 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 11 ways as a sum of consecutive naturals, for example, 214229541 + ... + 218237996.

It is an arithmetic number, because the mean of its divisors is an integer number (60861805324047).

Almost surely, 2^{866763546746436} is an apocalyptic number.

It is an amenable number.

866763546746436 is an abundant number, since it is smaller than the sum of its proper divisors (1324261444919256).

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

866763546746436 is a wasteful number, since it uses less digits than its factorization.

866763546746436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432523220 (or 432523215 counting only the distinct ones).

The product of its digits is 52672757760, while the sum is 81.

The spelling of 866763546746436 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, five hundred forty-six million, seven hundred forty-six thousand, four hundred thirty-six".