670791680 has 96 divisors (see below), whose sum is σ = 1733659200. Its totient is φ = 247627776.

The previous prime is 670791677. The next prime is 670791683. The reversal of 670791680 is 86197076.

670791680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (670791677) and next prime (670791683).

It is a super-2 number, since 2×670791680² = 899922955914444800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670791683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130601 + ... + 135639.

It is an arithmetic number, because the mean of its divisors is an integer number (18058950).

Almost surely, 2^670791680 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 670791680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866829600).

670791680 is an abundant number, since it is smaller than the sum of its proper divisors (1062867520).

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

670791680 is a wasteful number, since it uses less digits than its factorization.

670791680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079 (or 5059 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 670791680 is about 25899.6463296316. The cubic root of 670791680 is about 875.3785268371.

The spelling of 670791680 in words is "six hundred seventy million, seven hundred ninety-one thousand, six hundred eighty".