106106665505 has 4 divisors (see below), whose sum is σ = 127327998612. Its totient is φ = 84885332400.

The previous prime is 106106665487. The next prime is 106106665549. The reversal of 106106665505 is 505566601601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505566601601 = 8563 ⋅59040827.

It can be written as a sum of positive squares in 2 ways, for example, as 49857530944 + 56249134561 = 223288^2 + 237169^2 .

It is not a de Polignac number, because 106106665505 - 2²² = 106102471201 is a prime.

It is a super-2 number, since 2×106106665505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 10610666546 + ... + 10610666555.

It is an arithmetic number, because the mean of its divisors is an integer number (31831999653).

Almost surely, 2^106106665505 is an apocalyptic number.

It is an amenable number.

106106665505 is a deficient number, since it is larger than the sum of its proper divisors (21221333107).

106106665505 is an equidigital number, since it uses as much as digits as its factorization.

106106665505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21221333106.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 106106665505 in words is "one hundred six billion, one hundred six million, six hundred sixty-five thousand, five hundred five".