66748303 has 4 divisors (see below), whose sum is σ = 66767008. Its totient is φ = 66729600.

The previous prime is 66748291. The next prime is 66748321. The reversal of 66748303 is 30384766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30384766 = 2 ⋅15192383.

It is a cyclic number.

It is not a de Polignac number, because 66748303 - 2⁵ = 66748271 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 (66749303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151 + ... + 11752.

It is an arithmetic number, because the mean of its divisors is an integer number (16691752).

Almost surely, 2^66748303 is an apocalyptic number.

66748303 is a deficient number, since it is larger than the sum of its proper divisors (18705).

66748303 is a wasteful number, since it uses less digits than its factorization.

66748303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18704.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 66748303 is about 8169.9634638106. The cubic root of 66748303 is about 405.6455750827.

The spelling of 66748303 in words is "sixty-six million, seven hundred forty-eight thousand, three hundred three".