866788547077727 has 16 divisors (see below), whose sum is σ = 883616978839680. Its totient is φ = 849977729172000.

The previous prime is 866788547077703. The next prime is 866788547077741. The reversal of 866788547077727 is 727770745887668.

It is a cyclic number.

It is not a de Polignac number, because 866788547077727 - 2²⁸ = 866788278642271 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 (866788547077027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520794352 + ... + 1521364202.

It is an arithmetic number, because the mean of its divisors is an integer number (55226061177480).

Almost surely, 2^{866788547077727} is an apocalyptic number.

866788547077727 is a deficient number, since it is larger than the sum of its proper divisors (16828431761953).

866788547077727 is a wasteful number, since it uses less digits than its factorization.

866788547077727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585254.

The product of its (nonzero) digits is 86740254720, while the sum is 89.

The spelling of 866788547077727 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred forty-seven million, seventy-seven thousand, seven hundred twenty-seven".