66642303 has 48 divisors (see below), whose sum is σ = 114043776. Its totient is φ = 34292160.

The previous prime is 66642271. The next prime is 66642311. The reversal of 66642303 is 30324666.

It is not a de Polignac number, because 66642303 - 2⁵ = 66642271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66643303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81768 + ... + 82578.

It is an arithmetic number, because the mean of its divisors is an integer number (2375912).

Almost surely, 2^66642303 is an apocalyptic number.

66642303 is a deficient number, since it is larger than the sum of its proper divisors (47401473).

66642303 is a wasteful number, since it uses less digits than its factorization.

66642303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 66642303 is about 8163.4737091510. The cubic root of 66642303 is about 405.4307321058.

Adding to 66642303 its reverse (30324666), we get a palindrome (96966969).

The spelling of 66642303 in words is "sixty-six million, six hundred forty-two thousand, three hundred three".