1666700183485 has 8 divisors (see below), whose sum is σ = 2054095361496. Its totient is φ = 1297323385920.

The previous prime is 1666700183399. The next prime is 1666700183521. The reversal of 1666700183485 is 5843810076661.

It can be written as a sum of positive squares in 4 ways, for example, as 1037226144249 + 629474039236 = 1018443^2 + 793394^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1666700183485 - 2³¹ = 1664552699837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4504594906 + ... + 4504595275.

It is an arithmetic number, because the mean of its divisors is an integer number (256761920187).

Almost surely, 2^{1666700183485} is an apocalyptic number.

It is an amenable number.

1666700183485 is a deficient number, since it is larger than the sum of its proper divisors (387395178011).

1666700183485 is an equidigital number, since it uses as much as digits as its factorization.

1666700183485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009190223.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 1666700183485 in words is "one trillion, six hundred sixty-six billion, seven hundred million, one hundred eighty-three thousand, four hundred eighty-five".