166085739673 has 4 divisors (see below), whose sum is σ = 189812273920. Its totient is φ = 142359205428.

The previous prime is 166085739667. The next prime is 166085739689. The reversal of 166085739673 is 376937580661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166085739673 - 2⁵ = 166085739641 is a prime.

It is a super-2 number, since 2×166085739673² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166085739073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11863267113 + ... + 11863267126.

It is an arithmetic number, because the mean of its divisors is an integer number (47453068480).

Almost surely, 2^166085739673 is an apocalyptic number.

It is an amenable number.

166085739673 is a deficient number, since it is larger than the sum of its proper divisors (23726534247).

166085739673 is an equidigital number, since it uses as much as digits as its factorization.

166085739673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23726534246.

The product of its (nonzero) digits is 34292160, while the sum is 61.

The spelling of 166085739673 in words is "one hundred sixty-six billion, eighty-five million, seven hundred thirty-nine thousand, six hundred seventy-three".