6668650 has 24 divisors (see below), whose sum is σ = 12710124. Its totient is φ = 2601600.

The previous prime is 6668617. The next prime is 6668659. The reversal of 6668650 is 568666.

It can be written as a sum of positive squares in 6 ways, for example, as 2893401 + 3775249 = 1701^2 + 1943^2 .

It is not an unprimeable number, because it can be changed into a prime (6668659) 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, 424 + ... + 3676.

Almost surely, 2^6668650 is an apocalyptic number.

6668650 is a deficient number, since it is larger than the sum of its proper divisors (6041474).

6668650 is a wasteful number, since it uses less digits than its factorization.

6668650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306 (or 3301 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 6668650 is about 2582.3729397591. The cubic root of 6668650 is about 188.2258678069.

It can be divided in two parts, 666 and 8650, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 6668650 in words is "six million, six hundred sixty-eight thousand, six hundred fifty".