66473503 has 2 divisors, whose sum is σ = 66473504. Its totient is φ = 66473502.

The previous prime is 66473489. The next prime is 66473507. The reversal of 66473503 is 30537466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66473503 - 2¹⁷ = 66342431 is a prime.

It is equal to p_3922549 and since 66473503 and 3922549 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66473507) 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, 33236751 + 33236752.

It is an arithmetic number, because the mean of its divisors is an integer number (33236752).

Almost surely, 2^66473503 is an apocalyptic number.

66473503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66473503 is an equidigital number, since it uses as much as digits as its factorization.

66473503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 66473503 is about 8153.1284179755. The cubic root of 66473503 is about 405.0881340480.

The spelling of 66473503 in words is "sixty-six million, four hundred seventy-three thousand, five hundred three".