6689423360 has 64 divisors (see below), whose sum is σ = 16054764300. Its totient is φ = 2675703808.

The previous prime is 6689423353. The next prime is 6689423393. The reversal of 6689423360 is 633249866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6116491264 + 572932096 = 78208^2 + 23936^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143426 + ... + 184254.

Almost surely, 2^6689423360 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 6689423360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8027382150).

6689423360 is an abundant number, since it is smaller than the sum of its proper divisors (9365340940).

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

6689423360 is an frugal number, since it uses more digits than its factorization.

6689423360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40864 (or 40836 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 47.

The square root of 6689423360 is about 81788.8950897370. The cubic root of 6689423360 is about 1884.2111125470.

The spelling of 6689423360 in words is "six billion, six hundred eighty-nine million, four hundred twenty-three thousand, three hundred sixty".