66573499 has 2 divisors, whose sum is σ = 66573500. Its totient is φ = 66573498.

The previous prime is 66573497. The next prime is 66573517. The reversal of 66573499 is 99437566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66573499 - 2¹ = 66573497 is a prime.

Together with 66573497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66573491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33286749 + 33286750.

It is an arithmetic number, because the mean of its divisors is an integer number (33286750).

Almost surely, 2^66573499 is an apocalyptic number.

66573499 is a deficient number, since it is larger than the sum of its proper divisors (1).

66573499 is an equidigital number, since it uses as much as digits as its factorization.

66573499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 49.

The square root of 66573499 is about 8159.2584834653. The cubic root of 66573499 is about 405.2911567891.

The spelling of 66573499 in words is "sixty-six million, five hundred seventy-three thousand, four hundred ninety-nine".