6543452666 has 8 divisors (see below), whose sum is σ = 10241925984. Its totient is φ = 3129477340.

The previous prime is 6543452647. The next prime is 6543452683. The reversal of 6543452666 is 6662543456.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6543452666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71124440 + ... + 71124531.

It is an arithmetic number, because the mean of its divisors is an integer number (1280240748).

Almost surely, 2^6543452666 is an apocalyptic number.

6543452666 is a deficient number, since it is larger than the sum of its proper divisors (3698473318).

6543452666 is a wasteful number, since it uses less digits than its factorization.

6543452666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142248996.

The product of its digits is 3110400, while the sum is 47.

The square root of 6543452666 is about 80891.6106033252. The cubic root of 6543452666 is about 1870.4050011675.

The spelling of 6543452666 in words is "six billion, five hundred forty-three million, four hundred fifty-two thousand, six hundred sixty-six".