166686993585552 has 160 divisors (see below), whose sum is σ = 479777076301824. Its totient is φ = 49433613107200.

The previous prime is 166686993585481. The next prime is 166686993585577. The reversal of 166686993585552 is 255585399686661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 444540133 + ... + 444914939.

Almost surely, 2^{166686993585552} is an apocalyptic number.

166686993585552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166686993585552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239888538150912).

166686993585552 is an abundant number, since it is smaller than the sum of its proper divisors (313090082716272).

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

166686993585552 is a wasteful number, since it uses less digits than its factorization.

166686993585552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392797 (or 392791 counting only the distinct ones).

The product of its digits is 25194240000, while the sum is 84.

The spelling of 166686993585552 in words is "one hundred sixty-six trillion, six hundred eighty-six billion, nine hundred ninety-three million, five hundred eighty-five thousand, five hundred fifty-two".