66204799 has 2 divisors, whose sum is σ = 66204800. Its totient is φ = 66204798.

The previous prime is 66204781. The next prime is 66204823. The reversal of 66204799 is 99740266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66204799 - 2⁹ = 66204287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66204739) 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, 33102399 + 33102400.

It is an arithmetic number, because the mean of its divisors is an integer number (33102400).

Almost surely, 2^66204799 is an apocalyptic number.

66204799 is a deficient number, since it is larger than the sum of its proper divisors (1).

66204799 is an equidigital number, since it uses as much as digits as its factorization.

66204799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 66204799 is about 8136.6331489136. The cubic root of 66204799 is about 404.5415714187.

The spelling of 66204799 in words is "sixty-six million, two hundred four thousand, seven hundred ninety-nine".