66232603 has 4 divisors (see below), whose sum is σ = 66248928. Its totient is φ = 66216280.

The previous prime is 66232601. The next prime is 66232619. The reversal of 66232603 is 30623266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30623266 = 2 ⋅15311633.

It is a cyclic number.

It is not a de Polignac number, because 66232603 - 2¹ = 66232601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66232601) 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, 3150 + ... + 11932.

It is an arithmetic number, because the mean of its divisors is an integer number (16562232).

Almost surely, 2^66232603 is an apocalyptic number.

66232603 is a deficient number, since it is larger than the sum of its proper divisors (16325).

66232603 is an equidigital number, since it uses as much as digits as its factorization.

66232603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16324.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 66232603 is about 8138.3415386674. The cubic root of 66232603 is about 404.5981952073.

Adding to 66232603 its reverse (30623266), we get a palindrome (96855869).

The spelling of 66232603 in words is "sixty-six million, two hundred thirty-two thousand, six hundred three".