6668350386890 has 16 divisors (see below), whose sum is σ = 12003064404840. Its totient is φ = 2667332664000.

The previous prime is 6668350386821. The next prime is 6668350386947. The reversal of 6668350386890 is 986830538666.

It can be written as a sum of positive squares in 4 ways, for example, as 3905085824641 + 2763264562249 = 1976129^2 + 1662307^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6668350386890.

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, 4084640 + ... + 5479140.

Almost surely, 2^{6668350386890} is an apocalyptic number.

6668350386890 is a deficient number, since it is larger than the sum of its proper divisors (5334714017950).

6668350386890 is a wasteful number, since it uses less digits than its factorization.

6668350386890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872697.

The product of its (nonzero) digits is 268738560, while the sum is 68.

The spelling of 6668350386890 in words is "six trillion, six hundred sixty-eight billion, three hundred fifty million, three hundred eighty-six thousand, eight hundred ninety".