2665705155 has 16 divisors (see below), whose sum is σ = 4269258240. Its totient is φ = 1420332768.

The previous prime is 2665705121. The next prime is 2665705169. The reversal of 2665705155 is 5515075662.

It is a happy number.

It is not a de Polignac number, because 2665705155 - 2¹⁶ = 2665639619 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69937 + ... + 101106.

It is an arithmetic number, because the mean of its divisors is an integer number (266828640).

Almost surely, 2^2665705155 is an apocalyptic number.

2665705155 is a deficient number, since it is larger than the sum of its proper divisors (1603553085).

2665705155 is a wasteful number, since it uses less digits than its factorization.

2665705155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172090.

The product of its (nonzero) digits is 315000, while the sum is 42.

The square root of 2665705155 is about 51630.4673133994. The cubic root of 2665705155 is about 1386.5558599269. Note that the first 3 decimals are identical.

The spelling of 2665705155 in words is "two billion, six hundred sixty-five million, seven hundred five thousand, one hundred fifty-five".