166001012160543 has 24 divisors (see below), whose sum is σ = 274036464244608. Its totient is φ = 94856666384592.

The previous prime is 166001012160539. The next prime is 166001012160583. The reversal of 166001012160543 is 345061210100661.

166001012160543 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 0 + 1 + 0 + 1 + 2 + 1 + 605 + 43 = 666.

It is not a de Polignac number, because 166001012160543 - 2² = 166001012160539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166001012160498 and 166001012160507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166001012160583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8922805 + ... + 20288382.

It is an arithmetic number, because the mean of its divisors is an integer number (11418186010192).

Almost surely, 2^{166001012160543} is an apocalyptic number.

166001012160543 is a deficient number, since it is larger than the sum of its proper divisors (108035452084065).

166001012160543 is a wasteful number, since it uses less digits than its factorization.

166001012160543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29301403 (or 29301400 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 166001012160543 in words is "one hundred sixty-six trillion, one billion, twelve million, one hundred sixty thousand, five hundred forty-three".