166000571009 has 16 divisors (see below), whose sum is σ = 211353515520. Its totient is φ = 126812105280.

The previous prime is 166000570991. The next prime is 166000571039. The reversal of 166000571009 is 900175000661.

It is a de Polignac number, because none of the positive numbers 2^k-166000571009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166000571009.

It is not an unprimeable number, because it can be changed into a prime (166000571039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31448777 + ... + 31454054.

It is an arithmetic number, because the mean of its divisors is an integer number (13209594720).

Almost surely, 2^166000571009 is an apocalyptic number.

It is an amenable number.

166000571009 is a deficient number, since it is larger than the sum of its proper divisors (45352944511).

166000571009 is a wasteful number, since it uses less digits than its factorization.

166000571009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62902880.

The product of its (nonzero) digits is 11340, while the sum is 35.

The spelling of 166000571009 in words is "one hundred sixty-six billion, five hundred seventy-one thousand, nine".