689866560 has 168 divisors, whose sum is σ = 2449714176. Its totient is φ = 178007040.

The previous prime is 689866549. The next prime is 689866589. The reversal of 689866560 is 65668986.

It is a super-3 number, since 3×689866560³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689866497 and 689866506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85417 + ... + 93143.

It is an arithmetic number, because the mean of its divisors is an integer number (14581632).

Almost surely, 2^689866560 is an apocalyptic number.

689866560 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 689866560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224857088).

689866560 is an abundant number, since it is smaller than the sum of its proper divisors (1759847616).

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

689866560 is a wasteful number, since it uses less digits than its factorization.

689866560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7781 (or 7768 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 689866560 is about 26265.3109633219. The cubic root of 689866560 is about 883.5986247987.

The spelling of 689866560 in words is "six hundred eighty-nine million, eight hundred sixty-six thousand, five hundred sixty".