66634499 has 2 divisors, whose sum is σ = 66634500. Its totient is φ = 66634498.

The previous prime is 66634483. The next prime is 66634507. The reversal of 66634499 is 99443666.

66634499 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 not a de Polignac number, because 66634499 - 2⁴ = 66634483 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (66634459) 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, 33317249 + 33317250.

It is an arithmetic number, because the mean of its divisors is an integer number (33317250).

Almost surely, 2^66634499 is an apocalyptic number.

66634499 is a deficient number, since it is larger than the sum of its proper divisors (1).

66634499 is an equidigital number, since it uses as much as digits as its factorization.

66634499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 47.

The square root of 66634499 is about 8162.9957123595. The cubic root of 66634499 is about 405.4149057973.

The spelling of 66634499 in words is "sixty-six million, six hundred thirty-four thousand, four hundred ninety-nine".