166550320240 has 20 divisors (see below), whose sum is σ = 387229494744. Its totient is φ = 66620128064.

The previous prime is 166550320229. The next prime is 166550320283. The reversal of 166550320240 is 42023055661.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 166550320196 and 166550320205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040939422 + ... + 1040939581.

Almost surely, 2^166550320240 is an apocalyptic number.

166550320240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166550320240 is an abundant number, since it is smaller than the sum of its proper divisors (220679174504).

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

166550320240 is a wasteful number, since it uses less digits than its factorization.

166550320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081879016 (or 2081879010 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 166550320240 in words is "one hundred sixty-six billion, five hundred fifty million, three hundred twenty thousand, two hundred forty".