66413203 has 4 divisors (see below), whose sum is σ = 70319880. Its totient is φ = 62506528.

The previous prime is 66413159. The next prime is 66413287. The reversal of 66413203 is 30231466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30231466 = 2 ⋅15115733.

It is a cyclic number.

It is not a de Polignac number, because 66413203 - 2¹³ = 66405011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66411203) 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, 1953313 + ... + 1953346.

It is an arithmetic number, because the mean of its divisors is an integer number (17579970).

Almost surely, 2^66413203 is an apocalyptic number.

66413203 is a deficient number, since it is larger than the sum of its proper divisors (3906677).

66413203 is a wasteful number, since it uses less digits than its factorization.

66413203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906676.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 66413203 is about 8149.4296119422. The cubic root of 66413203 is about 404.9656080129.

Adding to 66413203 its reverse (30231466), we get a palindrome (96644669).

The spelling of 66413203 in words is "sixty-six million, four hundred thirteen thousand, two hundred three".