66089599 has 2 divisors, whose sum is σ = 66089600. Its totient is φ = 66089598.

The previous prime is 66089593. The next prime is 66089609. The reversal of 66089599 is 99598066.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66089599 - 2²³ = 57700991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66089593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33044799 + 33044800.

It is an arithmetic number, because the mean of its divisors is an integer number (33044800).

Almost surely, 2^66089599 is an apocalyptic number.

66089599 is a deficient number, since it is larger than the sum of its proper divisors (1).

66089599 is an equidigital number, since it uses as much as digits as its factorization.

66089599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 66089599 is about 8129.5509716097. The cubic root of 66089599 is about 404.3067936453.

The spelling of 66089599 in words is "sixty-six million, eighty-nine thousand, five hundred ninety-nine".