66544303 has 6 divisors (see below), whose sum is σ = 77408736. Its totient is φ = 57037932.

The previous prime is 66544301. The next prime is 66544363. The reversal of 66544303 is 30344566.

It is not a de Polignac number, because 66544303 - 2¹ = 66544301 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 (66544301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678975 + ... + 679072.

It is an arithmetic number, because the mean of its divisors is an integer number (12901456).

Almost surely, 2^66544303 is an apocalyptic number.

66544303 is a deficient number, since it is larger than the sum of its proper divisors (10864433).

66544303 is a wasteful number, since it uses less digits than its factorization.

66544303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358061 (or 1358054 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 66544303 is about 8157.4691540943. The cubic root of 66544303 is about 405.2319009241.

Adding to 66544303 its reverse (30344566), we get a palindrome (96888869).

The spelling of 66544303 in words is "sixty-six million, five hundred forty-four thousand, three hundred three".