1668441936085 has 16 divisors (see below), whose sum is σ = 2006067158640. Its totient is φ = 1332129576960.

The previous prime is 1668441936053. The next prime is 1668441936113. The reversal of 1668441936085 is 5806391448661.

It can be written as a sum of positive squares in 8 ways, for example, as 30128974929 + 1638312961156 = 173577^2 + 1279966^2 .

It is not a de Polignac number, because 1668441936085 - 2⁵ = 1668441936053 is a prime.

It is a super-3 number, since 3×1668441936085³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26556069 + ... + 26618821.

It is an arithmetic number, because the mean of its divisors is an integer number (125379197415).

Almost surely, 2^{1668441936085} is an apocalyptic number.

It is an amenable number.

1668441936085 is a deficient number, since it is larger than the sum of its proper divisors (337625222555).

1668441936085 is an equidigital number, since it uses as much as digits as its factorization.

1668441936085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73128.

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 1668441936085 in words is "one trillion, six hundred sixty-eight billion, four hundred forty-one million, nine hundred thirty-six thousand, eighty-five".