670999680 has 512 divisors, whose sum is σ = 2673216000. Its totient is φ = 157925376.

The previous prime is 670999657. The next prime is 670999717. The reversal of 670999680 is 86999076.

670999680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×670999680³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6514509 + ... + 6514611.

It is an arithmetic number, because the mean of its divisors is an integer number (5221125).

Almost surely, 2^670999680 is an apocalyptic number.

670999680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1336608000).

670999680 is an abundant number, since it is smaller than the sum of its proper divisors (2002216320).

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

670999680 is a wasteful number, since it uses less digits than its factorization.

670999680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 670999680 is about 25903.6615172450. The cubic root of 670999680 is about 875.4689970097.

The spelling of 670999680 in words is "six hundred seventy million, nine hundred ninety-nine thousand, six hundred eighty".