2660385 has 32 divisors (see below), whose sum is σ = 5241600. Its totient is φ = 1122048.

The previous prime is 2660377. The next prime is 2660401. The reversal of 2660385 is 5830662.

It is not a de Polignac number, because 2660385 - 2³ = 2660377 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391 + ... + 2339.

It is an arithmetic number, because the mean of its divisors is an integer number (163800).

2^2660385 is an apocalyptic number.

It is an amenable number.

2660385 is a deficient number, since it is larger than the sum of its proper divisors (2581215).

2660385 is a wasteful number, since it uses less digits than its factorization.

2660385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2660385 is about 1631.0686680824. The cubic root of 2660385 is about 138.5632826493.

The spelling of 2660385 in words is "two million, six hundred sixty thousand, three hundred eighty-five".