2653402166665 has 4 divisors (see below), whose sum is σ = 3184082600004. Its totient is φ = 2122721733328.

The previous prime is 2653402166641. The next prime is 2653402166669. The reversal of 2653402166665 is 5666612043562.

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 502448474896 + 2150953691769 = 708836^2 + 1466613^2 .

It is a cyclic number.

It is not a de Polignac number, because 2653402166665 - 2¹¹ = 2653402164617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2653402166669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265340216662 + ... + 265340216671.

It is an arithmetic number, because the mean of its divisors is an integer number (796020650001).

Almost surely, 2^{2653402166665} is an apocalyptic number.

It is an amenable number.

2653402166665 is a deficient number, since it is larger than the sum of its proper divisors (530680433339).

2653402166665 is an equidigital number, since it uses as much as digits as its factorization.

2653402166665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530680433338.

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 2653402166665 in words is "two trillion, six hundred fifty-three billion, four hundred two million, one hundred sixty-six thousand, six hundred sixty-five".