66455503 has 6 divisors (see below), whose sum is σ = 67409792. Its totient is φ = 65514540.

The previous prime is 66455489. The next prime is 66455507. The reversal of 66455503 is 30555466.

It is not a de Polignac number, because 66455503 - 2⁵ = 66455471 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 (66455507) 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 in 5 ways as a sum of consecutive naturals, for example, 1551 + ... + 11632.

Almost surely, 2^66455503 is an apocalyptic number.

66455503 is a deficient number, since it is larger than the sum of its proper divisors (954289).

66455503 is an equidigital number, since it uses as much as digits as its factorization.

66455503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13325 (or 13254 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 66455503 is about 8152.0244724853. The cubic root of 66455503 is about 405.0515668729.

The spelling of 66455503 in words is "sixty-six million, four hundred fifty-five thousand, five hundred three".