669650 has 24 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 262160.

The previous prime is 669649. The next prime is 669659. The reversal of 669650 is 56966.

It is a super-2 number, since 2×669650² = 896862245000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (669659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2837 + ... + 3063.

It is an arithmetic number, because the mean of its divisors is an integer number (53010).

2⁶⁶⁹⁶⁵⁰ is an apocalyptic number.

669650 is a deficient number, since it is larger than the sum of its proper divisors (602590).

669650 is a wasteful number, since it uses less digits than its factorization.

669650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 669650 is about 818.3214527311. The cubic root of 669650 is about 87.4881616637.

The spelling of 669650 in words is "six hundred sixty-nine thousand, six hundred fifty".