6666443560650 has 48 divisors (see below), whose sum is σ = 16535299262400. Its totient is φ = 1777447397760.

The previous prime is 6666443560639. The next prime is 6666443560717. The reversal of 6666443560650 is 560653446666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2397430 + ... + 4368129.

It is an arithmetic number, because the mean of its divisors is an integer number (344485401300).

Almost surely, 2^{6666443560650} is an apocalyptic number.

6666443560650 is an abundant number, since it is smaller than the sum of its proper divisors (9868855701750).

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

6666443560650 is a wasteful number, since it uses less digits than its factorization.

6666443560650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772143 (or 6772138 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 57.

The spelling of 6666443560650 in words is "six trillion, six hundred sixty-six billion, four hundred forty-three million, five hundred sixty thousand, six hundred fifty".