6689473560 has 512 divisors, whose sum is σ = 27997747200. Its totient is φ = 1380188160.

The previous prime is 6689473547. The next prime is 6689473573. The reversal of 6689473560 is 653749866.

6689473560 is a `hidden beast` number, since 6 + 6 + 8 + 9 + 4 + 73 + 560 = 666.

It is an interprime number because it is at equal distance from previous prime (6689473547) and next prime (6689473573).

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

It is a junction number, because it is equal to n+sod(n) for n = 6689473497 and 6689473506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21371964 + ... + 21372276.

It is an arithmetic number, because the mean of its divisors is an integer number (54683100).

Almost surely, 2^6689473560 is an apocalyptic number.

6689473560 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 6689473560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13998873600).

6689473560 is an abundant number, since it is smaller than the sum of its proper divisors (21308273640).

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

6689473560 is a wasteful number, since it uses less digits than its factorization.

6689473560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The square root of 6689473560 is about 81789.2019767891. The cubic root of 6689473560 is about 1884.2158258163.

It can be divided in two parts, 6689 and 473560, that added together give a square (480249 = 693²).

The spelling of 6689473560 in words is "six billion, six hundred eighty-nine million, four hundred seventy-three thousand, five hundred sixty".