66543303 has 8 divisors (see below), whose sum is σ = 88864128. Its totient is φ = 44292344.

The previous prime is 66543299. The next prime is 66543307. The reversal of 66543303 is 30334566.

It is an interprime number because it is at equal distance from previous prime (66543299) and next prime (66543307).

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

It is a cyclic number.

It is not a de Polignac number, because 66543303 - 2² = 66543299 is a prime.

It is a super-2 number, since 2×66543303² = 8856022348299618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66543307) 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, 15201 + ... + 19082.

It is an arithmetic number, because the mean of its divisors is an integer number (11108016).

Almost surely, 2^66543303 is an apocalyptic number.

66543303 is a deficient number, since it is larger than the sum of its proper divisors (22320825).

66543303 is a wasteful number, since it uses less digits than its factorization.

66543303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34933.

The product of its (nonzero) digits is 19440, while the sum is 30.

The square root of 66543303 is about 8157.4078603439. The cubic root of 66543303 is about 405.2298710286.

Adding to 66543303 its reverse (30334566), we get a palindrome (96877869).

The spelling of 66543303 in words is "sixty-six million, five hundred forty-three thousand, three hundred three".