667013500557221 has 8 divisors (see below), whose sum is σ = 673431927986400. Its totient is φ = 660600510174000.

The previous prime is 667013500557119. The next prime is 667013500557329. The reversal of 667013500557221 is 122755005310766.

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 667013500557221 - 2²⁶ = 667013433448357 is a prime.

It is a super-3 number, since 3×667013500557221³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667013500557221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667013500557721) 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, 1359014951 + ... + 1359505668.

It is an arithmetic number, because the mean of its divisors is an integer number (84178990998300).

Almost surely, 2^{667013500557221} is an apocalyptic number.

It is an amenable number.

667013500557221 is a deficient number, since it is larger than the sum of its proper divisors (6418427429179).

667013500557221 is a wasteful number, since it uses less digits than its factorization.

667013500557221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718522979.

The product of its (nonzero) digits is 2646000, while the sum is 50.

Adding to 667013500557221 its reverse (122755005310766), we get a palindrome (789768505867987).

The spelling of 667013500557221 in words is "six hundred sixty-seven trillion, thirteen billion, five hundred million, five hundred fifty-seven thousand, two hundred twenty-one".