689660610 has 64 divisors (see below), whose sum is σ = 1695665664. Its totient is φ = 179436800.

The previous prime is 689660597. The next prime is 689660611. The reversal of 689660610 is 16066986.

It is not an unprimeable number, because it can be changed into a prime (689660611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 649480 + ... + 650540.

It is an arithmetic number, because the mean of its divisors is an integer number (26494776).

Almost surely, 2^689660610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689660610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (847832832).

689660610 is an abundant number, since it is smaller than the sum of its proper divisors (1006005054).

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

689660610 is a wasteful number, since it uses less digits than its factorization.

689660610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 689660610 is about 26261.3901002974. The cubic root of 689660610 is about 883.5106873823.

The spelling of 689660610 in words is "six hundred eighty-nine million, six hundred sixty thousand, six hundred ten".