2600660065 has 8 divisors (see below), whose sum is σ = 3164747328. Its totient is φ = 2051224560.

The previous prime is 2600660063. The next prime is 2600660099. The reversal of 2600660065 is 5600660062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2600660065 - 2¹ = 2600660063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2600660063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3662547 + ... + 3663256.

It is an arithmetic number, because the mean of its divisors is an integer number (395593416).

Almost surely, 2^2600660065 is an apocalyptic number.

It is an amenable number.

2600660065 is a deficient number, since it is larger than the sum of its proper divisors (564087263).

2600660065 is an equidigital number, since it uses as much as digits as its factorization.

2600660065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7325879.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2600660065 is about 50996.6671950236. The cubic root of 2600660065 is about 1375.1852206684.

The spelling of 2600660065 in words is "two billion, six hundred million, six hundred sixty thousand, sixty-five".