866130602734861 has 4 divisors (see below), whose sum is σ = 870235487108224. Its totient is φ = 862025718361500.

The previous prime is 866130602734853. The next prime is 866130602734997. The reversal of 866130602734861 is 168437206031668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866130602734861 - 2³ = 866130602734853 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 866130602734861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866130602734801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2052442186365 + ... + 2052442186786.

It is an arithmetic number, because the mean of its divisors is an integer number (217558871777056).

Almost surely, 2^{866130602734861} is an apocalyptic number.

It is an amenable number.

866130602734861 is a deficient number, since it is larger than the sum of its proper divisors (4104884373363).

866130602734861 is a wasteful number, since it uses less digits than its factorization.

866130602734861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104884373362.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 866130602734861 in words is "eight hundred sixty-six trillion, one hundred thirty billion, six hundred two million, seven hundred thirty-four thousand, eight hundred sixty-one".