1668516870352 has 40 divisors (see below), whose sum is σ = 3294087430536. Its totient is φ = 818433048576.

The previous prime is 1668516870347. The next prime is 1668516870379. The reversal of 1668516870352 is 2530786158661.

It can be written as a sum of positive squares in 4 ways, for example, as 269510492736 + 1399006377616 = 519144^2 + 1182796^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 8533428 + ... + 8726764.

Almost surely, 2^{1668516870352} is an apocalyptic number.

It is an amenable number.

1668516870352 is a deficient number, since it is larger than the sum of its proper divisors (1625570560184).

1668516870352 is a wasteful number, since it uses less digits than its factorization.

1668516870352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203575 (or 203569 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 58.

The spelling of 1668516870352 in words is "one trillion, six hundred sixty-eight billion, five hundred sixteen million, eight hundred seventy thousand, three hundred fifty-two".