2641566165 has 64 divisors (see below), whose sum is σ = 5127598080. Its totient is φ = 1133614080.

The previous prime is 2641566149. The next prime is 2641566167. The reversal of 2641566165 is 5616651462.

It is not a de Polignac number, because 2641566165 - 2⁴ = 2641566149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641566167) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 781930 + ... + 785300.

It is an arithmetic number, because the mean of its divisors is an integer number (80118720).

Almost surely, 2^2641566165 is an apocalyptic number.

It is an amenable number.

2641566165 is a deficient number, since it is larger than the sum of its proper divisors (2486031915).

2641566165 is a wasteful number, since it uses less digits than its factorization.

2641566165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842.

The product of its digits is 259200, while the sum is 42.

The square root of 2641566165 is about 51396.1687774488. The cubic root of 2641566165 is about 1382.3578965957.

The spelling of 2641566165 in words is "two billion, six hundred forty-one million, five hundred sixty-six thousand, one hundred sixty-five".