6668654406 has 16 divisors (see below), whose sum is σ = 13340377344. Its totient is φ = 2222373384.

The previous prime is 6668654347. The next prime is 6668654449. The reversal of 6668654406 is 6044568666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99106 + ... + 152181.

It is an arithmetic number, because the mean of its divisors is an integer number (833773584).

Almost surely, 2^6668654406 is an apocalyptic number.

6668654406 is an abundant number, since it is smaller than the sum of its proper divisors (6671722938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6668654406 is a wasteful number, since it uses less digits than its factorization.

6668654406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255715.

The product of its (nonzero) digits is 4976640, while the sum is 51.

The square root of 6668654406 is about 81661.8295533476. The cubic root of 6668654406 is about 1882.2590926073.

The spelling of 6668654406 in words is "six billion, six hundred sixty-eight million, six hundred fifty-four thousand, four hundred six".