668032608121 has 8 divisors (see below), whose sum is σ = 674851842144. Its totient is φ = 661224039840.

The previous prime is 668032608079. The next prime is 668032608137. The reversal of 668032608121 is 121806230866.

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 668032608121 - 2¹³ = 668032599929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668032608421) 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, 2540500 + ... + 2791093.

It is an arithmetic number, because the mean of its divisors is an integer number (84356480268).

Almost surely, 2^668032608121 is an apocalyptic number.

It is an amenable number.

668032608121 is a deficient number, since it is larger than the sum of its proper divisors (6819234023).

668032608121 is a wasteful number, since it uses less digits than its factorization.

668032608121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332871.

The product of its (nonzero) digits is 165888, while the sum is 43.

Adding to 668032608121 its reverse (121806230866), we get a palindrome (789838838987).

The spelling of 668032608121 in words is "six hundred sixty-eight billion, thirty-two million, six hundred eight thousand, one hundred twenty-one".