66413243 has 8 divisors (see below), whose sum is σ = 71784048. Its totient is φ = 61079904.

The previous prime is 66413159. The next prime is 66413287. The reversal of 66413243 is 34231466.

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 66413243 - 2¹⁶ = 66347707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66412243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5621 + ... + 12822.

It is an arithmetic number, because the mean of its divisors is an integer number (8973006).

Almost surely, 2^66413243 is an apocalyptic number.

66413243 is a deficient number, since it is larger than the sum of its proper divisors (5370805).

66413243 is a wasteful number, since it uses less digits than its factorization.

66413243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18733.

The product of its digits is 10368, while the sum is 29.

The square root of 66413243 is about 8149.4320661013. The cubic root of 66413243 is about 404.9656893151.

The spelling of 66413243 in words is "sixty-six million, four hundred thirteen thousand, two hundred forty-three".