123166204466605 has 4 divisors (see below), whose sum is σ = 147799445359932. Its totient is φ = 98532963573280.

The previous prime is 123166204466597. The next prime is 123166204466611. The reversal of 123166204466605 is 506664402661321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67420553844004 + 55745650622601 = 8211002^2 + 7466301^2 .

It is not a de Polignac number, because 123166204466605 - 2³ = 123166204466597 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 3 ways as a sum of consecutive naturals, for example, 12316620446656 + ... + 12316620446665.

It is an arithmetic number, because the mean of its divisors is an integer number (36949861339983).

Almost surely, 2^{123166204466605} is an apocalyptic number.

It is an amenable number.

123166204466605 is a deficient number, since it is larger than the sum of its proper divisors (24633240893327).

123166204466605 is an equidigital number, since it uses as much as digits as its factorization.

123166204466605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24633240893326.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 123166204466605 in words is "one hundred twenty-three trillion, one hundred sixty-six billion, two hundred four million, four hundred sixty-six thousand, six hundred five".