166055441366661 has 64 divisors (see below), whose sum is σ = 286121074360320. Its totient is φ = 83167085453760.

The previous prime is 166055441366623. The next prime is 166055441366707. The reversal of 166055441366661 is 166663144550661.

It is a happy number.

166055441366661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166055441366661 - 2²¹ = 166055439269509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166055441366595 and 166055441366604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166055441366611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113412741 + ... + 114867578.

It is an arithmetic number, because the mean of its divisors is an integer number (4470641786880).

Almost surely, 2^{166055441366661} is an apocalyptic number.

166055441366661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166055441366661 is a deficient number, since it is larger than the sum of its proper divisors (120065632993659).

166055441366661 is a wasteful number, since it uses less digits than its factorization.

166055441366661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228280454.

The product of its (nonzero) digits is 55987200, while the sum is 60.

The spelling of 166055441366661 in words is "one hundred sixty-six trillion, fifty-five billion, four hundred forty-one million, three hundred sixty-six thousand, six hundred sixty-one".