669020 has 24 divisors (see below), whose sum is σ = 1533168. Its totient is φ = 243200.

The previous prime is 668999. The next prime is 669023. The reversal of 669020 is 20966.

669020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 1740.

It is an arithmetic number, because the mean of its divisors is an integer number (63882).

2⁶⁶⁹⁰²⁰ is an apocalyptic number.

It is an amenable number.

669020 is an abundant number, since it is smaller than the sum of its proper divisors (864148).

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

669020 is a wasteful number, since it uses less digits than its factorization.

669020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3059 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 669020 is about 817.9364278475. The cubic root of 669020 is about 87.4607170605.

Adding to 669020 its reverse (20966), we get a palindrome (689986).

The spelling of 669020 in words is "six hundred sixty-nine thousand, twenty".