1666548648486 has 32 divisors (see below), whose sum is σ = 3724848637920. Its totient is φ = 552305136672.

The previous prime is 1666548648461. The next prime is 1666548648487. The reversal of 1666548648486 is 6848468456661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666548648487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89187225 + ... + 89205908.

It is an arithmetic number, because the mean of its divisors is an integer number (116401519935).

Almost surely, 2^{1666548648486} is an apocalyptic number.

1666548648486 is an abundant number, since it is smaller than the sum of its proper divisors (2058299989434).

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

1666548648486 is a wasteful number, since it uses less digits than its factorization.

1666548648486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178393317 (or 178393311 counting only the distinct ones).

The product of its digits is 1274019840, while the sum is 72.

The spelling of 1666548648486 in words is "one trillion, six hundred sixty-six billion, five hundred forty-eight million, six hundred forty-eight thousand, four hundred eighty-six".