1668686703716 has 12 divisors (see below), whose sum is σ = 2920210783980. Its totient is φ = 834340765440.

The previous prime is 1668686703707. The next prime is 1668686703743. The reversal of 1668686703716 is 6173076868661.

It can be written as a sum of positive squares in 2 ways, for example, as 604599553600 + 1064087150116 = 777560^2 + 1031546^2 .

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, 2126156 + ... + 2803196.

It is an arithmetic number, because the mean of its divisors is an integer number (243350898665).

Almost surely, 2^{1668686703716} is an apocalyptic number.

It is an amenable number.

1668686703716 is a deficient number, since it is larger than the sum of its proper divisors (1251524080264).

1668686703716 is a wasteful number, since it uses less digits than its factorization.

1668686703716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293214 (or 1293212 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 65.

The spelling of 1668686703716 in words is "one trillion, six hundred sixty-eight billion, six hundred eighty-six million, seven hundred three thousand, seven hundred sixteen".