166106613 has 4 divisors (see below), whose sum is σ = 221475488. Its totient is φ = 110737740.

The previous prime is 166106597. The next prime is 166106623. The reversal of 166106613 is 316601661.

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: 316601661 = 3 ⋅105533887.

It is not a de Polignac number, because 166106613 - 2⁴ = 166106597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166106623) 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, 27684433 + ... + 27684438.

It is an arithmetic number, because the mean of its divisors is an integer number (55368872).

Almost surely, 2^166106613 is an apocalyptic number.

It is an amenable number.

166106613 is a deficient number, since it is larger than the sum of its proper divisors (55368875).

166106613 is an equidigital number, since it uses as much as digits as its factorization.

166106613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55368874.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 166106613 is about 12888.2354494322. The cubic root of 166106613 is about 549.7040975811.

The spelling of 166106613 in words is "one hundred sixty-six million, one hundred six thousand, six hundred thirteen".