669850 has 12 divisors (see below), whose sum is σ = 1246014. Its totient is φ = 267920.

The previous prime is 669847. The next prime is 669853. The reversal of 669850 is 58966.

It is an interprime number because it is at equal distance from previous prime (669847) and next prime (669853).

It can be written as a sum of positive squares in 3 ways, for example, as 301401 + 368449 = 549^2 + 607^2 .

It is not an unprimeable number, because it can be changed into a prime (669853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6649 + ... + 6748.

2⁶⁶⁹⁸⁵⁰ is an apocalyptic number.

669850 is a deficient number, since it is larger than the sum of its proper divisors (576164).

669850 is a wasteful number, since it uses less digits than its factorization.

669850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13409 (or 13404 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 669850 is about 818.4436449750. The cubic root of 669850 is about 87.4968706364.

The spelling of 669850 in words is "six hundred sixty-nine thousand, eight hundred fifty".