166560541646473 has 4 divisors (see below), whose sum is σ = 179372891003908. Its totient is φ = 153748192289040.

The previous prime is 166560541646453. The next prime is 166560541646501. The reversal of 166560541646473 is 374646145065661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88437623440384 + 78122918206089 = 9404128^2 + 8838717^2 .

It is a cyclic number.

It is not a de Polignac number, because 166560541646473 - 2⁵ = 166560541646441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166560541646453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6406174678698 + ... + 6406174678723.

It is an arithmetic number, because the mean of its divisors is an integer number (44843222750977).

Almost surely, 2^{166560541646473} is an apocalyptic number.

166560541646473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166560541646473 is a deficient number, since it is larger than the sum of its proper divisors (12812349357435).

166560541646473 is a wasteful number, since it uses less digits than its factorization.

166560541646473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12812349357434.

The product of its (nonzero) digits is 261273600, while the sum is 64.

The spelling of 166560541646473 in words is "one hundred sixty-six trillion, five hundred sixty billion, five hundred forty-one million, six hundred forty-six thousand, four hundred seventy-three".