6664210544 has 20 divisors (see below), whose sum is σ = 12913678680. Its totient is φ = 3331648320.

The previous prime is 6664210493. The next prime is 6664210571. The reversal of 6664210544 is 4450124666.

It is a junction number, because it is equal to n+sod(n) for n = 6664210498 and 6664210507.

It is a congruent number.

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, 113027 + ... + 161565.

It is an arithmetic number, because the mean of its divisors is an integer number (645683934).

Almost surely, 2^6664210544 is an apocalyptic number.

It is an amenable number.

6664210544 is a deficient number, since it is larger than the sum of its proper divisors (6249468136).

6664210544 is a wasteful number, since it uses less digits than its factorization.

6664210544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57128 (or 57122 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6664210544 is about 81634.6160890097. The cubic root of 6664210544 is about 1881.8408993800.

The spelling of 6664210544 in words is "six billion, six hundred sixty-four million, two hundred ten thousand, five hundred forty-four".