166585965829 has 8 divisors (see below), whose sum is σ = 167174856000. Its totient is φ = 165997437216.

The previous prime is 166585965811. The next prime is 166585965869. The reversal of 166585965829 is 928569585661.

It is a happy number.

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 166585965829 - 2⁹ = 166585965317 is a prime.

It is a super-2 number, since 2×166585965829² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166585965869) 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, 849954 + ... + 1027420.

It is an arithmetic number, because the mean of its divisors is an integer number (20896857000).

Almost surely, 2^166585965829 is an apocalyptic number.

It is an amenable number.

166585965829 is a deficient number, since it is larger than the sum of its proper divisors (588890171).

166585965829 is a wasteful number, since it uses less digits than its factorization.

166585965829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180779.

The product of its digits is 279936000, while the sum is 70.

The spelling of 166585965829 in words is "one hundred sixty-six billion, five hundred eighty-five million, nine hundred sixty-five thousand, eight hundred twenty-nine".