166001066543 has 8 divisors (see below), whose sum is σ = 178799566848. Its totient is φ = 153206735904.

The previous prime is 166001066537. The next prime is 166001066551. The reversal of 166001066543 is 345660100661.

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

It is a cyclic number.

It is not a de Polignac number, because 166001066543 - 2⁴ = 166001066527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166001066497 and 166001066506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166001066533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959480 + ... + 1119197.

It is an arithmetic number, because the mean of its divisors is an integer number (22349945856).

Almost surely, 2^166001066543 is an apocalyptic number.

166001066543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166001066543 is a deficient number, since it is larger than the sum of its proper divisors (12798500305).

166001066543 is a wasteful number, since it uses less digits than its factorization.

166001066543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084833.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 166001066543 in words is "one hundred sixty-six billion, one million, sixty-six thousand, five hundred forty-three".