866761280624773 has 2 divisors, whose sum is σ = 866761280624774. Its totient is φ = 866761280624772.

The previous prime is 866761280624761. The next prime is 866761280624801. The reversal of 866761280624773 is 377426082167668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 715971672976609 + 150789607648164 = 26757647^2 + 12279642^2 .

It is a cyclic number.

It is not a de Polignac number, because 866761280624773 - 2¹⁷ = 866761280493701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866761280624696 and 866761280624705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866761280694773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433380640312386 + 433380640312387.

It is an arithmetic number, because the mean of its divisors is an integer number (433380640312387).

Almost surely, 2^{866761280624773} is an apocalyptic number.

It is an amenable number.

866761280624773 is a deficient number, since it is larger than the sum of its proper divisors (1).

866761280624773 is an equidigital number, since it uses as much as digits as its factorization.

866761280624773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1365590016, while the sum is 73.

The spelling of 866761280624773 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred eighty million, six hundred twenty-four thousand, seven hundred seventy-three".