166005424163 has 4 divisors (see below), whose sum is σ = 168819075480. Its totient is φ = 163191772848.

The previous prime is 166005424139. The next prime is 166005424171. The reversal of 166005424163 is 361424500661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166005424163 - 2¹² = 166005420067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166005424063) 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, 1406825570 + ... + 1406825687.

It is an arithmetic number, because the mean of its divisors is an integer number (42204768870).

Almost surely, 2^166005424163 is an apocalyptic number.

166005424163 is a deficient number, since it is larger than the sum of its proper divisors (2813651317).

166005424163 is an equidigital number, since it uses as much as digits as its factorization.

166005424163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813651316.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 166005424163 in words is "one hundred sixty-six billion, five million, four hundred twenty-four thousand, one hundred sixty-three".