66716099 has 2 divisors, whose sum is σ = 66716100. Its totient is φ = 66716098.

The previous prime is 66716033. The next prime is 66716101. The reversal of 66716099 is 99061766.

It is a happy number.

66716099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66716099 is a prime.

Together with 66716101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66716009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358049 + 33358050.

It is an arithmetic number, because the mean of its divisors is an integer number (33358050).

Almost surely, 2^66716099 is an apocalyptic number.

66716099 is a deficient number, since it is larger than the sum of its proper divisors (1).

66716099 is an equidigital number, since it uses as much as digits as its factorization.

66716099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 66716099 is about 8167.9923481845. The cubic root of 66716099 is about 405.5803274236.

The spelling of 66716099 in words is "sixty-six million, seven hundred sixteen thousand, ninety-nine".