1668472855780 has 48 divisors (see below), whose sum is σ = 3575667942000. Its totient is φ = 653836271616.

The previous prime is 1668472855759. The next prime is 1668472855787. The reversal of 1668472855780 is 875582748661.

It can be written as a sum of positive squares in 8 ways, for example, as 411042547876 + 1257430307904 = 641126^2 + 1121352^2 .

It is not an unprimeable number, because it can be changed into a prime (1668472855787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4105725 + ... + 4493764.

It is an arithmetic number, because the mean of its divisors is an integer number (74493082125).

Almost surely, 2^{1668472855780} is an apocalyptic number.

1668472855780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668472855780 is an abundant number, since it is smaller than the sum of its proper divisors (1907195086220).

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

1668472855780 is a wasteful number, since it uses less digits than its factorization.

1668472855780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8599696 (or 8599694 counting only the distinct ones).

The product of its (nonzero) digits is 180633600, while the sum is 67.

It can be divided in two parts, 1668472 and 855780, that added together give a palindrome (2524252).

The spelling of 1668472855780 in words is "one trillion, six hundred sixty-eight billion, four hundred seventy-two million, eight hundred fifty-five thousand, seven hundred eighty".