866441085780413 has 16 divisors (see below), whose sum is σ = 1017926936339712. Its totient is φ = 727076188440000.

The previous prime is 866441085780383. The next prime is 866441085780419. The reversal of 866441085780413 is 314087580144668.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 866441085780413 - 2¹⁴ = 866441085764029 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 866441085780413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866441085780419) 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, 15732638 + ... + 44501663.

It is an arithmetic number, because the mean of its divisors is an integer number (63620433521232).

Almost surely, 2^{866441085780413} is an apocalyptic number.

It is an amenable number.

866441085780413 is a deficient number, since it is larger than the sum of its proper divisors (151485850559299).

866441085780413 is a wasteful number, since it uses less digits than its factorization.

866441085780413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60334916.

The product of its (nonzero) digits is 123863040, while the sum is 65.

The spelling of 866441085780413 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, eighty-five million, seven hundred eighty thousand, four hundred thirteen".