2560665 has 8 divisors (see below), whose sum is σ = 4097088. Its totient is φ = 1365680.

The previous prime is 2560661. The next prime is 2560669. The reversal of 2560665 is 5660652.

It is an interprime number because it is at equal distance from previous prime (2560661) and next prime (2560669).

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

It is not a de Polignac number, because 2560665 - 2² = 2560661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2560661) 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, 85341 + ... + 85370.

It is an arithmetic number, because the mean of its divisors is an integer number (512136).

2^2560665 is an apocalyptic number.

It is an amenable number.

2560665 is a deficient number, since it is larger than the sum of its proper divisors (1536423).

2560665 is a wasteful number, since it uses less digits than its factorization.

2560665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170719.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2560665 is about 1600.2077990061. The cubic root of 2560665 is about 136.8099198545.

The spelling of 2560665 in words is "two million, five hundred sixty thousand, six hundred sixty-five".