166003655441 has 8 divisors (see below), whose sum is σ = 179171332200. Its totient is φ = 152892859392.

The previous prime is 166003655429. The next prime is 166003655459. The reversal of 166003655441 is 144556300661.

It can be written as a sum of positive squares in 4 ways, for example, as 4824691600 + 161178963841 = 69460^2 + 401471^2 .

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

It is not a de Polignac number, because 166003655441 - 2¹⁴ = 166003639057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166003654441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14214110 + ... + 14225783.

It is an arithmetic number, because the mean of its divisors is an integer number (22396416525).

Almost surely, 2^166003655441 is an apocalyptic number.

It is an amenable number.

166003655441 is a deficient number, since it is larger than the sum of its proper divisors (13167676759).

166003655441 is a wasteful number, since it uses less digits than its factorization.

166003655441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28440355.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 166003655441 in words is "one hundred sixty-six billion, three million, six hundred fifty-five thousand, four hundred forty-one".