866446724444407 has 2 divisors, whose sum is σ = 866446724444408. Its totient is φ = 866446724444406.

The previous prime is 866446724444381. The next prime is 866446724444459. The reversal of 866446724444407 is 704444427644668.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866446724444407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866446724444507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433223362222203 + 433223362222204.

It is an arithmetic number, because the mean of its divisors is an integer number (433223362222204).

Almost surely, 2^{866446724444407} is an apocalyptic number.

866446724444407 is a deficient number, since it is larger than the sum of its proper divisors (1).

866446724444407 is an equidigital number, since it uses as much as digits as its factorization.

866446724444407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2774532096, while the sum is 70.

The spelling of 866446724444407 in words is "eight hundred sixty-six trillion, four hundred forty-six billion, seven hundred twenty-four million, four hundred forty-four thousand, four hundred seven".