66848213 has 4 divisors (see below), whose sum is σ = 70366560. Its totient is φ = 63329868.

The previous prime is 66848203. The next prime is 66848261. The reversal of 66848213 is 31284866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31284866 = 2 ⋅15642433.

It is a cyclic number.

It is not a de Polignac number, because 66848213 - 2¹⁴ = 66831829 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 (66848203) 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, 1759145 + ... + 1759182.

It is an arithmetic number, because the mean of its divisors is an integer number (17591640).

Almost surely, 2^66848213 is an apocalyptic number.

It is an amenable number.

66848213 is a deficient number, since it is larger than the sum of its proper divisors (3518347).

66848213 is a wasteful number, since it uses less digits than its factorization.

66848213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518346.

The product of its digits is 55296, while the sum is 38.

The square root of 66848213 is about 8176.0756478888. The cubic root of 66848213 is about 405.8478665935.

The spelling of 66848213 in words is "sixty-six million, eight hundred forty-eight thousand, two hundred thirteen".