679841646 has 48 divisors (see below), whose sum is σ = 1499831424. Its totient is φ = 205282000.

The previous prime is 679841581. The next prime is 679841647. The reversal of 679841646 is 646148976.

679841646 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 not an unprimeable number, because it can be changed into a prime (679841647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224281 + ... + 227291.

It is an arithmetic number, because the mean of its divisors is an integer number (31246488).

Almost surely, 2^679841646 is an apocalyptic number.

679841646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 679841646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749915712).

679841646 is an abundant number, since it is smaller than the sum of its proper divisors (819989778).

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

679841646 is a wasteful number, since it uses less digits than its factorization.

679841646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349 (or 3338 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 679841646 is about 26073.7731446755. The cubic root of 679841646 is about 879.2976687827.

The spelling of 679841646 in words is "six hundred seventy-nine million, eight hundred forty-one thousand, six hundred forty-six".