166164541 has 4 divisors (see below), whose sum is σ = 166495392. Its totient is φ = 165833692.

The previous prime is 166164533. The next prime is 166164553. The reversal of 166164541 is 145461661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 145461661 = 8543 ⋅17027.

It is a cyclic number.

It is not a de Polignac number, because 166164541 - 2³ = 166164533 is a prime.

It is a super-2 number, since 2×166164541² = 55221309371481362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166164497 and 166164506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166114541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164671 + ... + 165676.

It is an arithmetic number, because the mean of its divisors is an integer number (41623848).

Almost surely, 2^166164541 is an apocalyptic number.

It is an amenable number.

166164541 is a deficient number, since it is larger than the sum of its proper divisors (330851).

166164541 is an equidigital number, since it uses as much as digits as its factorization.

166164541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330850.

The product of its digits is 17280, while the sum is 34.

The square root of 166164541 is about 12890.4825743647. The cubic root of 166164541 is about 549.7679914009.

The spelling of 166164541 in words is "one hundred sixty-six million, one hundred sixty-four thousand, five hundred forty-one".