866786517537446 has 12 divisors (see below), whose sum is σ = 1429123225196436. Its totient is φ = 393993871607820.

The previous prime is 866786517537431. The next prime is 866786517537509. The reversal of 866786517537446 is 644735715687668.

866786517537446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1790881234340 + ... + 1790881234823.

It is an arithmetic number, because the mean of its divisors is an integer number (119093602099703).

Almost surely, 2^{866786517537446} is an apocalyptic number.

866786517537446 is a deficient number, since it is larger than the sum of its proper divisors (562336707658990).

866786517537446 is a wasteful number, since it uses less digits than its factorization.

866786517537446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581762469187 (or 3581762469176 counting only the distinct ones).

The product of its digits is 34139750400, while the sum is 83.

The spelling of 866786517537446 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, five hundred thirty-seven thousand, four hundred forty-six".