66504899 has 2 divisors, whose sum is σ = 66504900. Its totient is φ = 66504898.

The previous prime is 66504881. The next prime is 66504913. The reversal of 66504899 is 99840566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66504899 - 2²⁴ = 49727683 is a prime.

It is not a weakly prime, because it can be changed into another prime (66504299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33252449 + 33252450.

It is an arithmetic number, because the mean of its divisors is an integer number (33252450).

Almost surely, 2^66504899 is an apocalyptic number.

66504899 is a deficient number, since it is larger than the sum of its proper divisors (1).

66504899 is an equidigital number, since it uses as much as digits as its factorization.

66504899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 66504899 is about 8155.0535865805. The cubic root of 66504899 is about 405.1518995320.

The spelling of 66504899 in words is "sixty-six million, five hundred four thousand, eight hundred ninety-nine".