1656766868612 has 12 divisors (see below), whose sum is σ = 2901994673676. Its totient is φ = 827625533280.

The previous prime is 1656766868563. The next prime is 1656766868699. The reversal of 1656766868612 is 2168686676561.

It can be written as a sum of positive squares in 2 ways, for example, as 937825675396 + 718941193216 = 968414^2 + 847904^2 .

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, 189470339 + ... + 189479082.

It is an arithmetic number, because the mean of its divisors is an integer number (241832889473).

Almost surely, 2^{1656766868612} is an apocalyptic number.

It is an amenable number.

1656766868612 is a deficient number, since it is larger than the sum of its proper divisors (1245227805064).

1656766868612 is a wasteful number, since it uses less digits than its factorization.

1656766868612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378950518 (or 378950516 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 68.

The spelling of 1656766868612 in words is "one trillion, six hundred fifty-six billion, seven hundred sixty-six million, eight hundred sixty-eight thousand, six hundred twelve".