66330213 has 4 divisors (see below), whose sum is σ = 88440288. Its totient is φ = 44220140.

The previous prime is 66330211. The next prime is 66330239. The reversal of 66330213 is 31203366.

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.

It is a cyclic number.

It is not a de Polignac number, because 66330213 - 2¹ = 66330211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66330211) 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, 11055033 + ... + 11055038.

It is an arithmetic number, because the mean of its divisors is an integer number (22110072).

Almost surely, 2^66330213 is an apocalyptic number.

It is an amenable number.

66330213 is a deficient number, since it is larger than the sum of its proper divisors (22110075).

66330213 is a wasteful number, since it uses less digits than its factorization.

66330213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22110074.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 66330213 is about 8144.3362528815. The cubic root of 66330213 is about 404.7968559027.

Adding to 66330213 its reverse (31203366), we get a palindrome (97533579).

It can be divided in two parts, 663 and 30213, that added together give a triangular number (30876 = T₂₄₈).

The spelling of 66330213 in words is "sixty-six million, three hundred thirty thousand, two hundred thirteen".