668145141 has 12 divisors (see below), whose sum is σ = 965952000. Its totient is φ = 445036200.

The previous prime is 668145133. The next prime is 668145151. The reversal of 668145141 is 141541866.

668145141 is a `hidden beast` number, since 66 + 81 + 4 + 514 + 1 = 666.

It is not a de Polignac number, because 668145141 - 2³ = 668145133 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668145096 and 668145105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668145131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21891 + ... + 42608.

It is an arithmetic number, because the mean of its divisors is an integer number (80496000).

Almost surely, 2^668145141 is an apocalyptic number.

It is an amenable number.

668145141 is a deficient number, since it is larger than the sum of its proper divisors (297806859).

668145141 is a wasteful number, since it uses less digits than its factorization.

668145141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65656 (or 65653 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 668145141 is about 25848.5036510820. The cubic root of 668145141 is about 874.2257710843.

The spelling of 668145141 in words is "six hundred sixty-eight million, one hundred forty-five thousand, one hundred forty-one".