66435503 has 2 divisors, whose sum is σ = 66435504. Its totient is φ = 66435502.

The previous prime is 66435493. The next prime is 66435517. The reversal of 66435503 is 30553466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66435503 - 2¹⁰ = 66434479 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66435503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66431503) 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, 33217751 + 33217752.

It is an arithmetic number, because the mean of its divisors is an integer number (33217752).

Almost surely, 2^66435503 is an apocalyptic number.

66435503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66435503 is an equidigital number, since it uses as much as digits as its factorization.

66435503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 66435503 is about 8150.7976910239. The cubic root of 66435503 is about 405.0109289333.

Adding to 66435503 its reverse (30553466), we get a palindrome (96988969).

The spelling of 66435503 in words is "sixty-six million, four hundred thirty-five thousand, five hundred three".