66244503 has 16 divisors (see below), whose sum is σ = 95375840. Its totient is φ = 40656384.

The previous prime is 66244487. The next prime is 66244511. The reversal of 66244503 is 30544266.

It is not a de Polignac number, because 66244503 - 2⁴ = 66244487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66244543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13875 + ... + 18027.

It is an arithmetic number, because the mean of its divisors is an integer number (5960990).

Almost surely, 2^66244503 is an apocalyptic number.

66244503 is a deficient number, since it is larger than the sum of its proper divisors (29131337).

66244503 is a wasteful number, since it uses less digits than its factorization.

66244503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4578.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 66244503 is about 8139.0726130192. The cubic root of 66244503 is about 404.6224251182.

Adding to 66244503 its reverse (30544266), we get a palindrome (96788769).

The spelling of 66244503 in words is "sixty-six million, two hundred forty-four thousand, five hundred three".