1668353518474 has 16 divisors (see below), whose sum is σ = 2516434391016. Its totient is φ = 829542340800.

The previous prime is 1668353518453. The next prime is 1668353518519. The reversal of 1668353518474 is 4748153538661.

It can be written as a sum of positive squares in 4 ways, for example, as 546205249249 + 1122148269225 = 739057^2 + 1059315^2 .

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, 17785704 + ... + 17879260.

Almost surely, 2^{1668353518474} is an apocalyptic number.

1668353518474 is a deficient number, since it is larger than the sum of its proper divisors (848080872542).

1668353518474 is a wasteful number, since it uses less digits than its factorization.

1668353518474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143001.

The product of its digits is 58060800, while the sum is 61.

The spelling of 1668353518474 in words is "one trillion, six hundred sixty-eight billion, three hundred fifty-three million, five hundred eighteen thousand, four hundred seventy-four".