670400668 has 48 divisors (see below), whose sum is σ = 1413586944. Its totient is φ = 272113920.

The previous prime is 670400639. The next prime is 670400677. The reversal of 670400668 is 866004076.

670400668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32580 + ... + 49012.

It is an arithmetic number, because the mean of its divisors is an integer number (29449728).

Almost surely, 2^670400668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670400668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706793472).

670400668 is an abundant number, since it is smaller than the sum of its proper divisors (743186276).

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

670400668 is a wasteful number, since it uses less digits than its factorization.

670400668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16522 (or 16520 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 670400668 is about 25892.0966319841. The cubic root of 670400668 is about 875.2084044542.

The spelling of 670400668 in words is "six hundred seventy million, four hundred thousand, six hundred sixty-eight".