668012140 has 12 divisors (see below), whose sum is σ = 1402825536. Its totient is φ = 267204848.

The previous prime is 668012113. The next prime is 668012141. The reversal of 668012140 is 41210866.

668012140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 668012099 and 668012108.

It is not an unprimeable number, because it can be changed into a prime (668012141) 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, 16700284 + ... + 16700323.

It is an arithmetic number, because the mean of its divisors is an integer number (116902128).

Almost surely, 2^668012140 is an apocalyptic number.

It is an amenable number.

668012140 is an abundant number, since it is smaller than the sum of its proper divisors (734813396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668012140 is a wasteful number, since it uses less digits than its factorization.

668012140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33400616 (or 33400614 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 668012140 is about 25845.9308209242. The cubic root of 668012140 is about 874.1677594286.

The spelling of 668012140 in words is "six hundred sixty-eight million, twelve thousand, one hundred forty".