66026390459 has 2 divisors, whose sum is σ = 66026390460. Its totient is φ = 66026390458.

The previous prime is 66026390411. The next prime is 66026390473. The reversal of 66026390459 is 95409362066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66026390459 - 2³² = 61731423163 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66026390959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33013195229 + 33013195230.

It is an arithmetic number, because the mean of its divisors is an integer number (33013195230).

Almost surely, 2^66026390459 is an apocalyptic number.

66026390459 is a deficient number, since it is larger than the sum of its proper divisors (1).

66026390459 is an equidigital number, since it uses as much as digits as its factorization.

66026390459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 66026390459 in words is "sixty-six billion, twenty-six million, three hundred ninety thousand, four hundred fifty-nine".