5166286661 has 2 divisors, whose sum is σ = 5166286662. Its totient is φ = 5166286660.

The previous prime is 5166286649. The next prime is 5166286667. The reversal of 5166286661 is 1666826615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4942933636 + 223353025 = 70306^2 + 14945^2 .

It is a cyclic number.

It is not a de Polignac number, because 5166286661 - 2⁶ = 5166286597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5166286667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583143330 + 2583143331.

It is an arithmetic number, because the mean of its divisors is an integer number (2583143331).

Almost surely, 2^5166286661 is an apocalyptic number.

It is an amenable number.

5166286661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5166286661 is an equidigital number, since it uses as much as digits as its factorization.

5166286661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 5166286661 is about 71876.8854430964. The cubic root of 5166286661 is about 1728.7260115000.

The spelling of 5166286661 in words is "five billion, one hundred sixty-six million, two hundred eighty-six thousand, six hundred sixty-one".