66499503 has 8 divisors (see below), whose sum is σ = 101332608. Its totient is φ = 37999704.

The previous prime is 66499481. The next prime is 66499519. The reversal of 66499503 is 30599466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66499503 - 2²⁰ = 65450927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66499553) 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 in 7 ways as a sum of consecutive naturals, for example, 1583301 + ... + 1583342.

It is an arithmetic number, because the mean of its divisors is an integer number (12666576).

Almost surely, 2^66499503 is an apocalyptic number.

66499503 is a deficient number, since it is larger than the sum of its proper divisors (34833105).

66499503 is a wasteful number, since it uses less digits than its factorization.

66499503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166653.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 66499503 is about 8154.7227420679. The cubic root of 66499503 is about 405.1409416487.

The spelling of 66499503 in words is "sixty-six million, four hundred ninety-nine thousand, five hundred three".