8665722275647 has 2 divisors, whose sum is σ = 8665722275648. Its totient is φ = 8665722275646.

The previous prime is 8665722275633. The next prime is 8665722275677. The reversal of 8665722275647 is 7465722275668.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8665722275647 - 2¹⁹ = 8665721751359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8665722275677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332861137823 + 4332861137824.

It is an arithmetic number, because the mean of its divisors is an integer number (4332861137824).

Almost surely, 2^{8665722275647} is an apocalyptic number.

8665722275647 is a deficient number, since it is larger than the sum of its proper divisors (1).

8665722275647 is an equidigital number, since it uses as much as digits as its factorization.

8665722275647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 474163200, while the sum is 67.

The spelling of 8665722275647 in words is "eight trillion, six hundred sixty-five billion, seven hundred twenty-two million, two hundred seventy-five thousand, six hundred forty-seven".