669000 has 64 divisors (see below), whose sum is σ = 2096640. Its totient is φ = 177600.

The previous prime is 668999. The next prime is 669023. The reversal of 669000 is 966.

It is a super-2 number, since 2×669000² = 895122000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2889 + ... + 3111.

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

2⁶⁶⁹⁰⁰⁰ is an apocalyptic number.

669000 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 669000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048320).

669000 is an abundant number, since it is smaller than the sum of its proper divisors (1427640).

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

669000 is a wasteful number, since it uses less digits than its factorization.

669000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 669000 is about 817.9242018671. The cubic root of 669000 is about 87.4598455212.

Adding to 669000 its reverse (966), we get a palindrome (669966).

It can be divided in two parts, 6 and 69000, that added together give a triangular number (69006 = T₃₇₁).

The spelling of 669000 in words is "six hundred sixty-nine thousand".