6661108 has 6 divisors (see below), whose sum is σ = 11656946. Its totient is φ = 3330552.

The previous prime is 6661103. The next prime is 6661111. The reversal of 6661108 is 8011666.

It can be written as a sum of positive squares in only one way, i.e., 3640464 + 3020644 = 1908^2 + 1738^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832635 + ... + 832642.

Almost surely, 2^6661108 is an apocalyptic number.

It is an amenable number.

6661108 is a deficient number, since it is larger than the sum of its proper divisors (4995838).

6661108 is a wasteful number, since it uses less digits than its factorization.

6661108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665281 (or 1665279 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 6661108 is about 2580.9122418246. The cubic root of 6661108 is about 188.1548821750.

The spelling of 6661108 in words is "six million, six hundred sixty-one thousand, one hundred eight".