866788524320623 has 2 divisors, whose sum is σ = 866788524320624. Its totient is φ = 866788524320622.

The previous prime is 866788524320597. The next prime is 866788524320633. The reversal of 866788524320623 is 326023425887668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866788524320623 - 2¹⁷ = 866788524189551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866788524320633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433394262160311 + 433394262160312.

It is an arithmetic number, because the mean of its divisors is an integer number (433394262160312).

Almost surely, 2^{866788524320623} is an apocalyptic number.

866788524320623 is a deficient number, since it is larger than the sum of its proper divisors (1).

866788524320623 is an equidigital number, since it uses as much as digits as its factorization.

866788524320623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1114767360, while the sum is 70.

The spelling of 866788524320623 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-four million, three hundred twenty thousand, six hundred twenty-three".