668614121 has 8 divisors (see below), whose sum is σ = 765874560. Its totient is φ = 571789728.

The previous prime is 668614109. The next prime is 668614127. The reversal of 668614121 is 121416866.

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-668614121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668614127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105716 + ... + 111861.

It is an arithmetic number, because the mean of its divisors is an integer number (95734320).

Almost surely, 2^668614121 is an apocalyptic number.

It is an amenable number.

668614121 is a deficient number, since it is larger than the sum of its proper divisors (97260439).

668614121 is a wasteful number, since it uses less digits than its factorization.

668614121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218023.

The product of its digits is 13824, while the sum is 35.

The square root of 668614121 is about 25857.5737647599. The cubic root of 668614121 is about 874.4302668281.

The spelling of 668614121 in words is "six hundred sixty-eight million, six hundred fourteen thousand, one hundred twenty-one".