6657504544672 has 12 divisors (see below), whose sum is σ = 13106962072386. Its totient is φ = 3328752272320.

The previous prime is 6657504544643. The next prime is 6657504544673. The reversal of 6657504544672 is 2764454057566.

It can be written as a sum of positive squares in only one way, i.e., 5854251237136 + 803253307536 = 2419556^2 + 896244^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6657504544672.

It is not an unprimeable number, because it can be changed into a prime (6657504544673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104023508479 + ... + 104023508542.

Almost surely, 2^{6657504544672} is an apocalyptic number.

It is an amenable number.

6657504544672 is a deficient number, since it is larger than the sum of its proper divisors (6449457527714).

6657504544672 is a wasteful number, since it uses less digits than its factorization.

6657504544672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208047017031 (or 208047017023 counting only the distinct ones).

The product of its (nonzero) digits is 169344000, while the sum is 61.

The spelling of 6657504544672 in words is "six trillion, six hundred fifty-seven billion, five hundred four million, five hundred forty-four thousand, six hundred seventy-two".