866615671261411 has 16 divisors (see below), whose sum is σ = 918725213458944. Its totient is φ = 815733851416704.

The previous prime is 866615671261387. The next prime is 866615671261451. The reversal of 866615671261411 is 114162176516668.

866615671261411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 866615671261411 - 2¹⁹ = 866615670737123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866615671261411.

It is not an unprimeable number, because it can be changed into a prime (866615671261451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284534166 + ... + 287563771.

It is an arithmetic number, because the mean of its divisors is an integer number (57420325841184).

Almost surely, 2^{866615671261411} is an apocalyptic number.

866615671261411 is a deficient number, since it is larger than the sum of its proper divisors (52109542197533).

866615671261411 is a wasteful number, since it uses less digits than its factorization.

866615671261411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572099010.

The product of its digits is 17418240, while the sum is 61.

It can be divided in two parts, 86661567 and 1261411, that added together give a palindrome (87922978).

The spelling of 866615671261411 in words is "eight hundred sixty-six trillion, six hundred fifteen billion, six hundred seventy-one million, two hundred sixty-one thousand, four hundred eleven".