660334220123 has 4 divisors (see below), whose sum is σ = 699177409560. Its totient is φ = 621491030688.

The previous prime is 660334220071. The next prime is 660334220129. The reversal of 660334220123 is 321022433066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660334220123 - 2⁶ = 660334220059 is a prime.

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 660334220123.

It is not an unprimeable number, because it can be changed into a prime (660334220129) 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, 19421594693 + ... + 19421594726.

It is an arithmetic number, because the mean of its divisors is an integer number (174794352390).

Almost surely, 2^660334220123 is an apocalyptic number.

660334220123 is a deficient number, since it is larger than the sum of its proper divisors (38843189437).

660334220123 is a wasteful number, since it uses less digits than its factorization.

660334220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38843189436.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 660334220123 its reverse (321022433066), we get a palindrome (981356653189).

The spelling of 660334220123 in words is "six hundred sixty billion, three hundred thirty-four million, two hundred twenty thousand, one hundred twenty-three".