66043413 has 12 divisors (see below), whose sum is σ = 97426368. Its totient is φ = 43091880.

The previous prime is 66043391. The next prime is 66043451. The reversal of 66043413 is 31434066.

It is not a de Polignac number, because 66043413 - 2⁸ = 66043157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66043013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77643 + ... + 78488.

It is an arithmetic number, because the mean of its divisors is an integer number (8118864).

Almost surely, 2^66043413 is an apocalyptic number.

It is an amenable number.

66043413 is a deficient number, since it is larger than the sum of its proper divisors (31382955).

66043413 is a wasteful number, since it uses less digits than its factorization.

66043413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156184 (or 156181 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 66043413 is about 8126.7098508560. The cubic root of 66043413 is about 404.2125898905.

Adding to 66043413 its reverse (31434066), we get a palindrome (97477479).

The spelling of 66043413 in words is "sixty-six million, forty-three thousand, four hundred thirteen".