66166106165 has 16 divisors (see below), whose sum is σ = 82577738496. Its totient is φ = 50854305600.

The previous prime is 66166106159. The next prime is 66166106197. The reversal of 66166106165 is 56160166166.

It is a de Polignac number, because none of the positive numbers 2^k-66166106165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2509421 + ... + 2535650.

It is an arithmetic number, because the mean of its divisors is an integer number (5161108656).

Almost surely, 2^66166106165 is an apocalyptic number.

It is an amenable number.

66166106165 is a deficient number, since it is larger than the sum of its proper divisors (16411632331).

66166106165 is a wasteful number, since it uses less digits than its factorization.

66166106165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045180.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 66166106165 in words is "sixty-six billion, one hundred sixty-six million, one hundred six thousand, one hundred sixty-five".