1668425001765 has 16 divisors (see below), whose sum is σ = 2682894480000. Its totient is φ = 885355175232.

The previous prime is 1668425001751. The next prime is 1668425001769. The reversal of 1668425001765 is 5671005248661.

It is a happy number.

It is not a de Polignac number, because 1668425001765 - 2⁹ = 1668425001253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668425001769) 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 15 ways as a sum of consecutive naturals, for example, 279465190 + ... + 279471159.

It is an arithmetic number, because the mean of its divisors is an integer number (167680905000).

Almost surely, 2^{1668425001765} is an apocalyptic number.

1668425001765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1668425001765 is a deficient number, since it is larger than the sum of its proper divisors (1014469478235).

1668425001765 is a wasteful number, since it uses less digits than its factorization.

1668425001765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558936556.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 1668425001765 in words is "one trillion, six hundred sixty-eight billion, four hundred twenty-five million, one thousand, seven hundred sixty-five".