866786050078664 has 16 divisors (see below), whose sum is σ = 1625366620475520. Its totient is φ = 433354951285200.

The previous prime is 866786050078661. The next prime is 866786050078693. The reversal of 866786050078664 is 466870050687668.

866786050078664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×866786050078664² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866786050078661) 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, 4759122512 + ... + 4759304639.

It is an arithmetic number, because the mean of its divisors is an integer number (101585413779720).

Almost surely, 2^{866786050078664} is an apocalyptic number.

It is an amenable number.

866786050078664 is a deficient number, since it is larger than the sum of its proper divisors (758580570396856).

866786050078664 is a wasteful number, since it uses less digits than its factorization.

866786050078664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9518438540 (or 9518438536 counting only the distinct ones).

The product of its (nonzero) digits is 3901685760, while the sum is 77.

The spelling of 866786050078664 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, fifty million, seventy-eight thousand, six hundred sixty-four".