6657145928872 has 16 divisors (see below), whose sum is σ = 12912567534900. Its totient is φ = 3213794586240.

The previous prime is 6657145928863. The next prime is 6657145928929. The reversal of 6657145928872 is 2788295417566.

It can be written as a sum of positive squares in 2 ways, for example, as 6639351969636 + 17793959236 = 2576694^2 + 133394^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14347297029 + ... + 14347297492.

Almost surely, 2^{6657145928872} is an apocalyptic number.

It is an amenable number.

6657145928872 is a deficient number, since it is larger than the sum of its proper divisors (6255421606028).

6657145928872 is a wasteful number, since it uses less digits than its factorization.

6657145928872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28694594556 (or 28694594552 counting only the distinct ones).

The product of its digits is 406425600, while the sum is 70.

The spelling of 6657145928872 in words is "six trillion, six hundred fifty-seven billion, one hundred forty-five million, nine hundred twenty-eight thousand, eight hundred seventy-two".