668454142 has 8 divisors (see below), whose sum is σ = 1004998176. Its totient is φ = 333454752.

The previous prime is 668454121. The next prime is 668454151. The reversal of 668454142 is 241454866.

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

It is a junction number, because it is equal to n+sod(n) for n = 668454095 and 668454104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385078 + ... + 386809.

It is an arithmetic number, because the mean of its divisors is an integer number (125624772).

Almost surely, 2^668454142 is an apocalyptic number.

668454142 is a deficient number, since it is larger than the sum of its proper divisors (336544034).

668454142 is a wasteful number, since it uses less digits than its factorization.

668454142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772322.

The product of its digits is 184320, while the sum is 40.

The square root of 668454142 is about 25854.4801146726. The cubic root of 668454142 is about 874.3605197528.

The spelling of 668454142 in words is "six hundred sixty-eight million, four hundred fifty-four thousand, one hundred forty-two".