1668865318186 has 16 divisors (see below), whose sum is σ = 2746126787040. Its totient is φ = 754337292880.

The previous prime is 1668865318181. The next prime is 1668865318321. The reversal of 1668865318186 is 6818135688661.

It is a super-2 number, since 2×1668865318186² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1668865318181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211888561 + ... + 211896436.

It is an arithmetic number, because the mean of its divisors is an integer number (171632924190).

Almost surely, 2^{1668865318186} is an apocalyptic number.

1668865318186 is a deficient number, since it is larger than the sum of its proper divisors (1077261468854).

1668865318186 is a wasteful number, since it uses less digits than its factorization.

1668865318186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423785189.

The product of its digits is 79626240, while the sum is 67.

The spelling of 1668865318186 in words is "one trillion, six hundred sixty-eight billion, eight hundred sixty-five million, three hundred eighteen thousand, one hundred eighty-six".