8664846484661 has 2 divisors, whose sum is σ = 8664846484662. Its totient is φ = 8664846484660.

The previous prime is 8664846484639. The next prime is 8664846484667. The reversal of 8664846484661 is 1664846484668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5747138387761 + 2917708096900 = 2397319^2 + 1708130^2 .

It is a cyclic number.

It is not a de Polignac number, because 8664846484661 - 2¹⁴ = 8664846468277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8664846484667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332423242330 + 4332423242331.

It is an arithmetic number, because the mean of its divisors is an integer number (4332423242331).

Almost surely, 2^{8664846484661} is an apocalyptic number.

It is an amenable number.

8664846484661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8664846484661 is an equidigital number, since it uses as much as digits as its factorization.

8664846484661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1019215872, while the sum is 71.

The spelling of 8664846484661 in words is "eight trillion, six hundred sixty-four billion, eight hundred forty-six million, four hundred eighty-four thousand, six hundred sixty-one".