866761311627487 has 16 divisors (see below), whose sum is σ = 904612823712000. Its totient is φ = 829441141333504.

The previous prime is 866761311627461. The next prime is 866761311627521. The reversal of 866761311627487 is 784726113167668.

It is a cyclic number.

It is not a de Polignac number, because 866761311627487 - 2¹¹ = 866761311625439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866761311627287) 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, 101272689 + ... + 109497397.

It is an arithmetic number, because the mean of its divisors is an integer number (56538301482000).

Almost surely, 2^{866761311627487} is an apocalyptic number.

866761311627487 is a deficient number, since it is larger than the sum of its proper divisors (37851512084513).

866761311627487 is a wasteful number, since it uses less digits than its factorization.

866761311627487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257010.

The product of its digits is 682795008, while the sum is 73.

The spelling of 866761311627487 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, three hundred eleven million, six hundred twenty-seven thousand, four hundred eighty-seven".