866786463837065 has 4 divisors (see below), whose sum is σ = 1040143756604484. Its totient is φ = 693429171069648.

The previous prime is 866786463837011. The next prime is 866786463837067. The reversal of 866786463837065 is 560738364687668.

866786463837065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212045786251264 + 654740677585801 = 14561792^2 + 25587901^2 .

It is a cyclic number.

It is not a de Polignac number, because 866786463837065 - 2¹² = 866786463832969 is a prime.

It is a super-3 number, since 3×866786463837065³ (a number of 46 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (866786463837067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86678646383702 + ... + 86678646383711.

It is an arithmetic number, because the mean of its divisors is an integer number (260035939151121).

Almost surely, 2^{866786463837065} is an apocalyptic number.

It is an amenable number.

866786463837065 is a deficient number, since it is larger than the sum of its proper divisors (173357292767419).

866786463837065 is a wasteful number, since it uses less digits than its factorization.

866786463837065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173357292767418.

The product of its (nonzero) digits is 35115171840, while the sum is 83.

The spelling of 866786463837065 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred sixty-three million, eight hundred thirty-seven thousand, sixty-five".