6650866 has 4 divisors (see below), whose sum is σ = 9976302. Its totient is φ = 3325432.

The previous prime is 6650849. The next prime is 6650867. The reversal of 6650866 is 6680566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6395841 + 255025 = 2529^2 + 505^2 .

It is not an unprimeable number, because it can be changed into a prime (6650867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1662715 + ... + 1662718.

Almost surely, 2^6650866 is an apocalyptic number.

6650866 is a deficient number, since it is larger than the sum of its proper divisors (3325436).

6650866 is a wasteful number, since it uses less digits than its factorization.

6650866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325435.

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

The square root of 6650866 is about 2578.9272963773. The cubic root of 6650866 is about 188.0583981851.

The spelling of 6650866 in words is "six million, six hundred fifty thousand, eight hundred sixty-six".