866157857770678 has 16 divisors (see below), whose sum is σ = 1417662864195840. Its totient is φ = 393620994282600.

The previous prime is 866157857770657. The next prime is 866157857770697. The reversal of 866157857770678 is 876077758751668.

866157857770678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4356042618 + ... + 4356241453.

It is an arithmetic number, because the mean of its divisors is an integer number (88603929012240).

Almost surely, 2^{866157857770678} is an apocalyptic number.

866157857770678 is a deficient number, since it is larger than the sum of its proper divisors (551505006425162).

866157857770678 is a wasteful number, since it uses less digits than its factorization.

866157857770678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8712288603.

The product of its (nonzero) digits is 46467993600, while the sum is 88.

The spelling of 866157857770678 in words is "eight hundred sixty-six trillion, one hundred fifty-seven billion, eight hundred fifty-seven million, seven hundred seventy thousand, six hundred seventy-eight".