1668418516676 has 12 divisors (see below), whose sum is σ = 2941044320508. Its totient is φ = 828120139392.

The previous prime is 1668418516649. The next prime is 1668418516727. The reversal of 1668418516676 is 6766158148661.

It can be written as a sum of positive squares in 2 ways, for example, as 601825299076 + 1066593217600 = 775774^2 + 1032760^2 .

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, 1522279121 + ... + 1522280216.

It is an arithmetic number, because the mean of its divisors is an integer number (245087026709).

Almost surely, 2^{1668418516676} is an apocalyptic number.

It is an amenable number.

1668418516676 is a deficient number, since it is larger than the sum of its proper divisors (1272625803832).

1668418516676 is a wasteful number, since it uses less digits than its factorization.

1668418516676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044559478 (or 3044559476 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 65.

The spelling of 1668418516676 in words is "one trillion, six hundred sixty-eight billion, four hundred eighteen million, five hundred sixteen thousand, six hundred seventy-six".