1668053011212 has 864 divisors, whose sum is σ = 5593049978880. Its totient is φ = 431728496640.

The previous prime is 1668053011211. The next prime is 1668053011213. The reversal of 1668053011212 is 2121103508661.

1668053011212 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 0 + 530 + 112 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1668053011211) and next prime (1668053011213).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1668053011211) 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 287 ways as a sum of consecutive naturals, for example, 2721130218 + ... + 2721130830.

Almost surely, 2^{1668053011212} is an apocalyptic number.

1668053011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668053011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2796524989440).

1668053011212 is an abundant number, since it is smaller than the sum of its proper divisors (3924996967668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668053011212 is a wasteful number, since it uses less digits than its factorization.

1668053011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Adding to 1668053011212 its reverse (2121103508661), we get a palindrome (3789156519873).

The spelling of 1668053011212 in words is "one trillion, six hundred sixty-eight billion, fifty-three million, eleven thousand, two hundred twelve".