166164627005 has 54 divisors (see below), whose sum is σ = 222496026606. Its totient is φ = 119074790016.

The previous prime is 166164626959. The next prime is 166164627007. The reversal of 166164627005 is 500726461661.

It can be written as a sum of positive squares in 9 ways, for example, as 25097530084 + 141067096921 = 158422^2 + 375589^2 .

It is not a de Polignac number, because 166164627005 - 2¹² = 166164622909 is a prime.

It is a super-2 number, since 2×166164627005² (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 (166164627007) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 438428906 + ... + 438429284.

It is an arithmetic number, because the mean of its divisors is an integer number (4120296789).

Almost surely, 2^166164627005 is an apocalyptic number.

It is an amenable number.

166164627005 is a deficient number, since it is larger than the sum of its proper divisors (56331399601).

166164627005 is an frugal number, since it uses more digits than its factorization.

166164627005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 166164627005 in words is "one hundred sixty-six billion, one hundred sixty-four million, six hundred twenty-seven thousand, five".