66213043213 has 8 divisors (see below), whose sum is σ = 66381347520. Its totient is φ = 66044842080.

The previous prime is 66213043157. The next prime is 66213043229. The reversal of 66213043213 is 31234031266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66213043213 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 (66213043613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351968 + ... + 1400086.

It is an arithmetic number, because the mean of its divisors is an integer number (8297668440).

Almost surely, 2^66213043213 is an apocalyptic number.

It is an amenable number.

66213043213 is a deficient number, since it is larger than the sum of its proper divisors (168304307).

66213043213 is a wasteful number, since it uses less digits than its factorization.

66213043213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51587.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 66213043213 its reverse (31234031266), we get a palindrome (97447074479).

The spelling of 66213043213 in words is "sixty-six billion, two hundred thirteen million, forty-three thousand, two hundred thirteen".