1668518501852 has 12 divisors (see below), whose sum is σ = 2919960776880. Its totient is φ = 834243994176.

The previous prime is 1668518501843. The next prime is 1668518501857. The reversal of 1668518501852 is 2581058158661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668518501857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566333 + ... + 4006964.

It is an arithmetic number, because the mean of its divisors is an integer number (243330064740).

Almost surely, 2^{1668518501852} is an apocalyptic number.

It is an amenable number.

1668518501852 is a deficient number, since it is larger than the sum of its proper divisors (1251442275028).

1668518501852 is a wasteful number, since it uses less digits than its factorization.

1668518501852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7628380 (or 7628378 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 56.

The spelling of 1668518501852 in words is "one trillion, six hundred sixty-eight billion, five hundred eighteen million, five hundred one thousand, eight hundred fifty-two".