670668140 has 12 divisors (see below), whose sum is σ = 1408403136. Its totient is φ = 268267248.

The previous prime is 670668121. The next prime is 670668143. The reversal of 670668140 is 41866076.

670668140 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×670668140² = 899591508022119200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 670668094 and 670668103.

It is not an unprimeable number, because it can be changed into a prime (670668143) 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, 16766684 + ... + 16766723.

It is an arithmetic number, because the mean of its divisors is an integer number (117366928).

Almost surely, 2^670668140 is an apocalyptic number.

It is an amenable number.

670668140 is an abundant number, since it is smaller than the sum of its proper divisors (737734996).

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

670668140 is a wasteful number, since it uses less digits than its factorization.

670668140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33533416 (or 33533414 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 670668140 is about 25897.2612451587. The cubic root of 670668140 is about 875.3247839211.

The spelling of 670668140 in words is "six hundred seventy million, six hundred sixty-eight thousand, one hundred forty".