2166559487 has 2 divisors, whose sum is σ = 2166559488. Its totient is φ = 2166559486.

The previous prime is 2166559469. The next prime is 2166559513. The reversal of 2166559487 is 7849556612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166559487 - 2¹⁰ = 2166558463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166559427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083279743 + 1083279744.

It is an arithmetic number, because the mean of its divisors is an integer number (1083279744).

Almost surely, 2^2166559487 is an apocalyptic number.

2166559487 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166559487 is an equidigital number, since it uses as much as digits as its factorization.

2166559487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 53.

The square root of 2166559487 is about 46546.3155040224. The cubic root of 2166559487 is about 1293.9680089350.

The spelling of 2166559487 in words is "two billion, one hundred sixty-six million, five hundred fifty-nine thousand, four hundred eighty-seven".