2660264642065 has 12 divisors (see below), whose sum is σ = 3272078043612. Its totient is φ = 2076304104320.

The previous prime is 2660264642029. The next prime is 2660264642071. The reversal of 2660264642065 is 5602464620662.

It can be written as a sum of positive squares in 6 ways, for example, as 194284363729 + 2465980278336 = 440777^2 + 1570344^2 .

It is not a de Polignac number, because 2660264642065 - 2²¹ = 2660262544913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158246482 + ... + 158263291.

It is an arithmetic number, because the mean of its divisors is an integer number (272673170301).

Almost surely, 2^{2660264642065} is an apocalyptic number.

It is an amenable number.

2660264642065 is a deficient number, since it is larger than the sum of its proper divisors (611813401547).

2660264642065 is an equidigital number, since it uses as much as digits as its factorization.

2660264642065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316509860 (or 316509819 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 2660264642065 in words is "two trillion, six hundred sixty billion, two hundred sixty-four million, six hundred forty-two thousand, sixty-five".