866788807366427 has 32 divisors (see below), whose sum is σ = 960736006024704. Its totient is φ = 775441028915200.

The previous prime is 866788807366423. The next prime is 866788807366501. The reversal of 866788807366427 is 724663708887668.

It is a cyclic number.

It is not a de Polignac number, because 866788807366427 - 2² = 866788807366423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866788807366423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12371880977 + ... + 12371951037.

It is an arithmetic number, because the mean of its divisors is an integer number (30023000188272).

Almost surely, 2^{866788807366427} is an apocalyptic number.

866788807366427 is a deficient number, since it is larger than the sum of its proper divisors (93947198658277).

866788807366427 is a wasteful number, since it uses less digits than its factorization.

866788807366427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123139.

The product of its (nonzero) digits is 43698880512, while the sum is 86.

The spelling of 866788807366427 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, eight hundred seven million, three hundred sixty-six thousand, four hundred twenty-seven".