669760 has 112 divisors (see below), whose sum is σ = 2048256. Its totient is φ = 202752.

The previous prime is 669733. The next prime is 669763. The reversal of 669760 is 67966.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (669763) by changing a digit.

669760 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29109 + ... + 29131.

It is an arithmetic number, because the mean of its divisors is an integer number (18288).

2⁶⁶⁹⁷⁶⁰ 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 669760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024128).

669760 is an abundant number, since it is smaller than the sum of its proper divisors (1378496).

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

669760 is a wasteful number, since it uses less digits than its factorization.

669760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 669760 is about 818.3886607230. The cubic root of 669760 is about 87.4929518132.

The spelling of 669760 in words is "six hundred sixty-nine thousand, seven hundred sixty".