6656606661682 has 16 divisors (see below), whose sum is σ = 10587169183320. Its totient is φ = 3128102546688.

The previous prime is 6656606661583. The next prime is 6656606661709. The reversal of 6656606661682 is 2861666066566.

It can be written as a sum of positive squares in 4 ways, for example, as 6472907844481 + 183698817201 = 2544191^2 + 428601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138045393 + ... + 138093604.

Almost surely, 2^{6656606661682} is an apocalyptic number.

6656606661682 is a deficient number, since it is larger than the sum of its proper divisors (3930562521638).

6656606661682 is a wasteful number, since it uses less digits than its factorization.

6656606661682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276139725.

The product of its (nonzero) digits is 134369280, while the sum is 64.

The spelling of 6656606661682 in words is "six trillion, six hundred fifty-six billion, six hundred six million, six hundred sixty-one thousand, six hundred eighty-two".