669088 has 48 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 274176.

The previous prime is 669077. The next prime is 669089. The reversal of 669088 is 880966.

It is not an unprimeable number, because it can be changed into a prime (669089) by changing a digit.

669088 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 7 ways as a sum of consecutive naturals, for example, 6445 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2⁶⁶⁹⁰⁸⁸ 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 669088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786240).

669088 is an abundant number, since it is smaller than the sum of its proper divisors (903392).

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

669088 is a wasteful number, since it uses less digits than its factorization.

669088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 669088 is about 817.9779948140. The cubic root of 669088 is about 87.4636801644.

The spelling of 669088 in words is "six hundred sixty-nine thousand, eighty-eight".